- Pedro gives Chelsea an early lead.
- Michy Batshuayi doubles advantage just before half time.
- Willian makes it three in the second half.
- John Terry sent off for last man foul on Lee Angol.
- Lee Nichols nets consolation for Posh.
- Second for Pedro puts result beyond doubt.
Full time: Chelsea 4-1 Peterborough
Chelsea ease the demons from their defeat to Tottenham with a fine display to see off Peterborough. Pedro did the damage with two goals, with Willian and Michy Batshuayi netting too. Peterborough were spirited but couldn't live with the Blues in the final third. Antonio Conte's side go into the hat for the fourth round as the team to beat.
That is all we have time for on this live blog. To follow the second half of Tottenham vs Aston Villa, head this way – but until next time goodbye.
Goodness me Chelsea waste another chance, this time in stoppage time. Pedro tees up Batshuayi, who is denied by McGee before Loftus-Cheek hammers over. So many chances but only four goals to show for it.
Batshuayi proving himself to be wasteful again, running at a thread-bare Peterborough back-four but shoots horribly wide. Fabregas once again instigates the attack. He's been imperious today.
Another chance for Peterborough as Angol takes a swing at the back after getting the better of Pedro, but he lashes over.
John Terry protests his innocence after being shown his marching order.
Michael Bostwick takes aim with a dipping volley but he can't keep it down and Peterborough's chance to get a second comes and goes. Still time for more goals with 10 minutes remaining.
GOAL! Chelsea 4-1 Peterborough (Pedro)
No doubt about the result now as Chelsea get their fourth, and Pedro doubles up. Batshuayi lays the ball off and the Spaniard strokes the ball into the corner beyond McGee.
Willian fires Chelsea into a comfortable three-goal advantage.
GOAL: Chelsea 3-1 Peterborough (Tom Nichols)
A consolation, or something more for Peterborough? Chelsea down to 10-men and now their lead is cut as Tom Nichols converts from six yards out. Is the comeback on?
Red card: John Terry (Chelsea)
Bizarre scenes at Stamford Bridge. with the game heading towards comfortable Chelsea win they go down to 10 men as John Terry fouls Lee Angol. Branislav Ivanovic looked to be covering but Kevin Friend took his time before brandishing the red.
Antonio Conte can start to rest some of his second string now as Ola Aina comes on for Gary Cahill, who granted is the only survivor from the mid-week loss at Spurs. Jon Taylor and Martin Samuelson meanwhile come on for Posh.
Luke McGee somehow prevents Chelsea going four up as he keeps out Loftus-Cheek. Peterborough go up the other end and almost score themselves, but as Zouma clears the ball just evades Tom Nichols on the edge of the box.
GOAL! Chelsea 3-0 Peterborough (Willian)
Too easy for Chelsea and a third goal sees them book their place in round four. Willian cuts inside off the left, is given far too much room by Michael Smith and drills his shot into the far corner. Watch out, there could more more.
Michy Batshuayi puts Chelsea two-up.
Ruben Loftus-Cheek should really have put the game beyond Peterborough. Da Silva loses the ball in his own half and Batshuayi releases Loftus-Cheek, but he steers the ball wide.
Back underway at Stamford Bridge. An uphill task facing Peterborough United.
Half time: Chelsea 2-0 Peterborough
Chelsea have shown no signs of any hangover from losing to Tottenham in mid-week and have been close to perfect against Peterborough. Goals from Pedro and Michy Batshuayi have done the damage and it could have been more had it not been for Luke McGee and the woodwork. The Posh have impressed in patches, but they can't rival the cutting edge in the final third displayed by the Premier League leaders.
GOAL! Chelsea 2-0 Peterborough (Michy Batshuayi)
The goal that probably kills the tie. Peterborough pour players forwards and they get caught as Willian crosses, Chalobah pulls the ball back and Batshuayi takes one touch to control and a second to hammer past McGee. Terrible time to concede a goal, just as they looked to regaining a foothold in the tie.
A rare foray from Peterborough as Gwion Edwards drives to the byline, past Cahill, but his cross is turned away from virtually under his own bar by Zouma. Still in this game are Posh, while it remains 1-0.
Michy Batshauyi not endearing himself to Antonio Conte as he shoots instead of playing in Willian, who was in yards of room in the penalty area. Now McGee keeps out Willian from the angle. Peterborough just trying to survive now.
Kurt Zouma flattened on his return to the Chelsea team by a clumsy challenge by Tom Nichols. No booking by the France international needs medical attention, before resuming.
A candidate for one of the misses of the season from Pedro. Chelsea are queuing up to score after Loftus-Cheek is denied by McGee and he tees up Pedro, who beats the 'keeper but inexplicably hits the bar from six yards.
Pedro celebrates giving Chelsea the lead with their 50th goal of the season.
Lots of pressure from Chelsea but no second goal yet. Peterborough holding their own to be fair, and even pressing high up the pitch when the Blues try and build from the back; just as Grant McCann promised pre-match.