Uefa Champions League as it happened: Arsenal 1-3 Monaco - Bayer Leverkusen 1-0 Atletico Madrid

Away from London, Bayer Leverkusen take a slender advantage into their second leg against Atletico courtesy of a lovely goal from Hakan Calhanoglu. They were very impressive for large spells, but can perhaps count themselves slightly fortunate to have beaten Simeone's 10 men after Torres saw a goal ruled out in questionable circumstances.

A vintage away performance from Monaco and they will certainly fancy their chances of finishing the job and progressing to the quarter-finals next month. Wenger said he did not accept that his old team were underdogs in this tie and so it has proved.

A breathless finish at the Emirates and the final whistle brings boos from the home fans. Arsenal were just dreadful at times tonight and have handed a major advantage to Monaco ahead of the second leg.

FULL TIME

Arsenal 1-3 Monaco

Bayer Leverkusen 1-0 Atletico Madrid

Wow. Just as Arsenal think they are back in this tie, Carrasco may have landed the killer blow with another masterful counter attack.

Oxlade-Chamberlain is dispossessed in the Arsenal half and the Belgian then leaves him trailing in his wake with a fantastic burst of pace and composed finish. Two-goal advantage restored and Jardim sprints down the touchline in celebration.

GOAL! Arsenal 1-3 Monaco (Yannick Ferreira Carrasco)

Arsenal handed a crucial lifeline in the dying minutes of the first leg. After a period of sustained pressure, a headed clearance finds it way to Oxlade-Chamberlain who shuffles his feet wonderfully to create space and unleash a lovely curled effort from 25 yards that gave Subasic no chance at all.

Goal! Arsenal 1-2 Monaco (Oxlade-Chamberlain)

Carrasco draws an angry reaction from his teammates as he shoots tamely at Ospina on the break.

Side netting for Sanchez as he fails to apply the finishing touch to Ozil's corner. Monaco make their final substitution as Bernardo Silva comes on for Martial. Five minutes remaining.

A third and final substitution from Arsenal as Rosicky replaces Cazorla. For Monaco, Dirar jogs off and defender Kurzawa is on.

Angered by the decision to deny his team an equaliser, experienced midfielder Tiago is dismissed for a second bookable offence.

Diego Simeone's team may choose to accept a narrow defeat now they are down to 10 men and take their chances at home.

RED CARD - Tiago (Atletico Madrid)

Atletico think they are level but the goal is chalked off in rather controversial fashion as a corner from Antoine Griezmann is not dealt with by Leverkusen and Fernando Torres turns home at the far post.

The officials rule that the corner went out of play before reaching the penalty area.

Applause from the away supporters as Berbatov is withdrawn. Carrasco replaces him.

We are approaching the last 15 minutes of both games now. Can Arsenal reduce the deficit? Will Bayer Leverkusen take a more commanding lead to the Vicente Calderon in March?

Arsenal looking extremely jittery in defence and are lucky not to be punished for their lack of concentration. Ospina lofts a poor ball forward to Oxlade-Chamberlain and the substitute is forced into a last-ditch tackle after a mishit pass from Koscielny.

Oxlade-Chamberlain is summoned by Wenger and replaces Francis Coquelin.

Nick Howson at The Emirates Stadium

A huge sense of anger has swept across the Emirates as Dimitar Berbatov, the former Tottenham striker no less, puts perhaps the tie beyond Arsenal after less than hour played of their last 16 clash.

"Arsenal may have begun the second half in the ascendency but they have adopted a approach which was asking for trouble. Monaco haven't been great tonight, but they haven't needed to be, merely preying on the deluge of Gunners errors.

Olivier Giroud is off for Arsenal, replaced by Theo Walcott after an evening to forget.

The rapid winger almost makes an immediate impact as his shot is saved by Subasic. Welbeck looked certain to notch on the rebound but his effort hits Walcott and loops over.

What a goal from Leverkusen and it's the least they deserve. Hakan Calhanoglu is the man who's got it, smashing home after collecting a wonderful backheel from the skilful Bellarabi.

Goal! Bayer Leverkusen 1-0 Atletico Madrid (Calhanoglu)

The night goes from bad to worse for Giroud as he blazes over from close range after Sanchez's fizzing effort is pushed into his path by Subasic. Woeful finishing.

Well, well, well. Despite dominating since the restart, Arsenal are now two goals behind after being hit on the counter. Woeful defending from Mertesacker sees the Gunners captain leave Martial with acres of space to run into and feed Berbatov who beats Ospina with an emphatic finish.

The home side are in all sorts of trouble here.

Goal! Arsenal 0-2 Monaco (Berbatov)

Another Arsenal chance and it's that man Giroud again. This time, he rises high to head Cazorla's free-kick over the bar from six-yards out.

A very early second-half chance for Giroud is wasted. The former Montpellier man sends a low cross from Sanchez wide of the near post. He should have done much better with that.

The second half of both games are now underway.

Wenger may have to consider a change or two if this insipid performance does not improve quickly. Tomas Rosicky, Theo Walcott and Alex Oxlade-Chamberlain are all on the bench for Arsenal.

Half-time in both games and Wenger will surely not be happy. Despite a lively opening, his side have been below par and trail thanks to Kondogbia's deflected strike.

In Germany, Bayer Leverkusen have been on top for long spells but Spahic's drive is the closest they have come to breaking the deadlock. Atletico so nearly edged ahead just before the break but Tiago's acrobatic effort was well saved by Bernd Leno.

HALF TIME

Arsenal 0-1 Monaco

Bayer Leverkusen 0-0 Atletico Madrid

Nick Howson at The Emirates Stadium

Early optimism has been replaced by a bout of nerves among the Arsenal ranks as Monaco, with their foot on the ball, have begun to sling the ball around like they own the place, and that confidence has been followed by the opening goal.

"Arsene Wenger said his side lost to Bayern Munich last season when they conceded the away goal but promised his team had learned from such a mistake. Kondogbia's defelcted shot off Per Mertesacker suggests he is somewhat mistaken.

The first shot on target of the evening hits the back of the net. Monaco are given a reprieve as Giroud misses the target after fine work from Bellerin, but Geoffrey Kondogbia puts his team ahead with a hopeful shot that deceives David Ospina after taking a wicked deflection off Per Mertesacker. Nightmare for the hosts.

Goal! Arsenal 0-1 Monaco (Kondogbia)

Monaco go straight down the other end and create an opening of their own. Impressive skill from Anthony Martial sees him comfortably beat Hector Bellerin but Joao Moutinho can't control his volley which sails over.

A half-chance for Sanchez as he receives possession from Ozil and shoots just over. The Chilean claims a corner from Subasic, but a goal kick is awarded.

It's all gone a bit quiet at the Emirates. Koscielny breaks forward to dispossess the casual Berbatov but his attempted cross is deflected into the arms of Danijel Subasic.

Bayer Leverkusen come closest to breaking the deadlock against Atletico after a dominant start. Emir Spahic strikes the bar with a quite stunning strike from distance.

A chance for Arsenal as Sanchez's corner is met by the head of Giroud, but the ball sails harmlessly wide. A tough ask for the Frenchman who was battling with two defenders.

Nick Howson at The Emirates Stadium

Arsenal have started like they know this is their chance in Europe's premier club competition. Danny Welbeck has twice gone close and as a result the Emirates Stadium is rocking.

"Monaco are no doubt intent on taking the sting out of the game and though they have at least stemmed the flow of chances, their periods of possession are rare at best.

Laurent Koscielny with a crucial headed intervention for Arsenal as a whipped cross nearly finds Berbatov in the six-yard box. Monaco starting to gain a foothold now.

Monaco struggling to find any fluency moving forward so far. Berbatov looks decidedly miffed as Elderson sends a cross well over his head.

Alexis Sanchez feeds Mesut Ozil with another perfectly lofted pass into the box and the German wants a penalty after the ball strikes the arm of Wallace. Nothing doing for referee Deniz Aytekin.

This is an impressive start from Arsenal. Cazorla plays a lovely one-two with Olivier Giroud but can't quite find the lively Welbeck with a low cross. It could be a long night for Monaco if they can't take the early sting out of the game.

An early sight of goal for Danny Welbeck. Santi Cazorla floats an inviting ball towards the England international, who outmuscles Elderson but can't find the target.

We are underway at the Emirates Stadium and BayArena.

If Monaco were to win tonight, it would be their first victory in an away fixture in the knockout phase of the Champions League.

They lost two and drew one of their away knockout fixtures en route to the final in 2004.

In tonight's other game, Bayer Leverkusen are seeking to progress through to the quarter-finals of the Champions League for the very first time. 2014 finalists Atletico Madrid should provide a very stern test indeed for Roger Schmidt's side.

Arsenal certainly start as the favourites in North London tonight. While Monaco finished top of Group C, they have scored just four goals in Europe so far this season and 24 less than Ligue 1 leaders Lyon.

Their main hope, one suspects, will be that their impressive defensive record holds up long enough for them to remain competitive and head back to Stade Louis II for the second leg not needing to overturn a big deficit.

As well as trying to ensure that Arsenal do not exit the Champions League at this stage for the fifth consecutive year, tonight's match holds extra significance for Arsene Wenger as it pits him against the club he managed for seven years between 1987-94.

Tonight's clash at the Emirates Stadium also sees a welcome return to English football for Bulgarian Dimitar Berbatov. The former Tottenham, Manchester United and Fulham striker joined Monaco during the summer but is yet to score in this competition for Leonardo Jardim's side.

Nick Howson at the Emirates Stadium

Arsenal and Monaco may be forced to share the London spotlight with The Brits Awards taking place at the O2 Arena, but try telling Arsene Wenger – on the night of his reunion with the principality – has been relegated into second place.

"With the Gunners playing Champions League knock-out football for a 15<sup>th straight season, it is about time they made another genuine bid to win the competition and with their fortunes in the lap of the gods, Monaco were drawn out of the hat for the last 16.

"Leonardo Jardim's side are injury ridden and without the on loan Radamel Falcao arrive in north London having edged through their group, having conceded one goal in the process. They could either be tricky opponents or cannon fodder for Wenger's men tonight.

Arsene Wenger makes two changes from the side who beat Crystal Palace 2-1 at Selhurst Park on Saturday, with full-backs Hector Bellerin and Kieran Gibbs replacing Calum Chambers and Nacho Monreal.

Monaco team to face Arsenal: Subasic, Elderson, Wallace, Abdennour, Touré, Fabinho, Moutinho, Kondogbia, Dirar, Martial, Berbatov.

Good evening and welcome to our live coverage of tonight's Champions League last 16 ties. Stand by for the latest team news.

Arsenal team to face Monaco: Ospina, Bellerin, Mertesacker, Koscielny, Gibbs, Coquelin, Cazorla, Ozil, Sanchez, Welbeck. Giroud.