Full-time: Celta Vigo 0-1 Manchester United
- Manchester United take firm control of Europa League semi-final tie after deserved first-leg victory at the Estadio de Balaidos
- Marcus Rashford curls home brilliant 25-yard free-kick in the 67th minute after being fouled by Hugo Mallo
- Visitors initially plagued by yet more profligacy as Rashford, Henrikh Mkhitaryan and Jesse Lingard all waste excellent chances during goalless first half lit up by the impressive performance of Celta goalkeeper Sergio Alvarez
- Initially boosted by the respective returns of Paul Pogba, Eric Bailly and Chris Smalling, United are once again bitten by the injury bug as Rashford and substitute Ashley Young limp off late on
- Return fixture takes place at Old Trafford next Thursday night, with the final booked for 24 May in Stockholm
- Wednesday: Ajax 4-1 Lyon
That is all for this particular live blog, thanks for following along. Post-match reaction from Mourinho to come at some stage later tonight. Keep your eyes peeled.
I will also be back tomorrow evening to bring you live coverage of a Friday night Premier League derby between West Ham and Tottenham. Hope you can join me for that one.
A thoroughly deserved victory for United, who return to Old Trafford with an away goal and a clean sheet. They will now be considered overwhelming favourites to reach their first Europa League final.
Mourinho may well be disappointed that his side were unable to secure a more emphatic lead. Fans will also nervously await news of those injuries suffered by Rashford and Young.
Celta Vigo 0-1 Manchester United
Aspas wins a last-gasp free-kick just inside the United half. Jozabed's delivery is weak and headed clear by Fellaini.
Bailly makes an important intervention in the United box and Darmian hastily hacks clear.
The visitors are caught sitting too deep before a long ball in towards Guidetti is caught by Romero.
Five minutes of stoppage time have been signalled by the fourth official.
Berizzo, who replaced Wass with Fulham midfielder Jozabed a few minutes ago, withdraws Mallo in favour of Beauvue.
Young, who only replaced Mkhitaryan 10 minutes ago, sinks to the turf with an apparent hamstring problem and Mourinho has no hesitation in sending on Smalling.
Just as it appeared that United's injury problems were beginning to ease...
More terrific United defending during the closing stages. This time substitute Young slides in on Mallo and manages to win a goal kick.
Pogba is booked for time-wasting.
Very brave defending from Bailly to dive in low with his head and snuff out the danger posed by Guidetti.
That could have been very painful.
Fellaini's latest transgression leaves Berizzo and the home fans pleading for a second yellow card. The referee does not oblige.
Martial is now ready to enter the fray and goalscorer Rashford is the man who will head to the bench.
The 19-year-old looks to have picked up a knock here as he limps off gingerly, much to the annoyance of everyone in sky blue.
Celta's players tell him in no uncertain terms to get a move on.
Mourinho's first change sees Mkhitaryan make way for Young. Martial is also stripped and ready to come on, but will have to wait a little longer.
A vicious half-volley from Lingard whistles narrowly past the post. The England midfielder will be disappointed not to have got his name on the scoresheet tonight.
Looking to engineer a response, Aspas combines well with both Guidetti and Jonny. However, his subsequent volley misses the target.
With Fellaini disrupting the wall, Rashford steps up to curl an unstoppable right-footed free-kick into the back of the net. Superb technique from the teenage striker, who has now scored 11 goals across all competitions so far this season.
Sergio initially seemed to step to his left, which gave him no time to switch his weight back in the other direction.
United have their away goal. They are now firmly in the ascendancy.
Goal: Celta Vigo 0-1 Manchester United (Marcus Rashford)
Mallo flattens Rashford and promptly joins Fellaini in the referee's notebook. United have a free-kick in a very dangerous position...
The persistent Guidetti pressures Bailly into conceding a cheap corner following a booming kick from Sergio. Romero plucks the ball out the air and immediately tries to pick out the run of Lingard.
Space opens up for Rashford down the left-hand side. Needing no second invitation, he strides forward with purpose before curling a shot wide with three red shirts waiting in the middle.
Spoke too soon. Romero tips the ball over after Sisto's latest effort loops up menacingly off Herrera.
Encouraging for the hosts.
The game just entering a real lull now as we approach the 60-minute mark. Celta Vigo's lack of a quality final ball means they are finding it hard to trouble that United backline.
Aspas, not exactly an aerial powerhouse, glances a header wide of Romero's right-hand post.