54. All too often Chelsea seem to be the architects of their own problems this season.
They were coasting at two-nil but that goal and sending off have buckled them mentally.
Brighton are knocking the ball around, making the hosts chase the ball currently.
52. The next goal in this game is pivotal.
Should Brighton get it, this nervy home defence could possibly self-destruct.
If Chelsea can get it, they give themselves a two-goal cushion.
Caicedo is booked for a needless foul.
50. Baleba tries his luck from distance but it is a tame effort.
Simple save for Sanchez in the Chelsea goal.
Pochettino is the man now looking very frustrated on the touchline.
48. Adingra comes forward for The Seagulls but he tries one turn too many and the chance was gone.
Chelsea go straight down the other end and Sterling feeds it into the path of Jackson in front of goal.
Van Hecke does well to cut the pass out and also prevent a corner.
46. This game is all to play for now.
With Brighton's passing game, they could really utilise the space from Chelsea being a man down.
It could be a long 45 minutes for Pochettino's side, chasing shadows, trying to protect their lead.
We are back underway in West London.
Brighton were back out on the pitch early, eager to get going again.
The visitors get the second half started.
Gallagher's inability to control his tackling may well cost his side dearly.
Ironically, he had been made captain for this game and did not show the temperament of one.
That said, neither has Reece James since he was made club captain at the start of the season.
Maybe one day Pochettino may see fit to make the only leader, Thiago Silva, the skipper of this Chelsea team.
Chelsea were sitting pretty after two almost identical goals gave them a cushion in this game.
The Brighton goal seemed to stun The Blues as they were in control of the game.
Gallagher still flying into tackles after already having received a yellow card was only going to end one way and the midfielder did not even make it to the interval.
The referee brings an entertaining first half to a close.
Hinshelwood was booked for a foul on Sterling just before the break.
Brighton will feel they are very much in this game, given that they now have a man advantage.
45+4. Brighton force a corner as Adingra's cross is blocked.
Chelsea are looking very nervous at the back now.
De Zerbi must feel that The Blues are there for the taking now.
45+2. We are going to see five additional minutes.
Gallagher trudges off the pitch and this game has been turned on its head.
Just after Brighton had scored to get back into this game, the Chelsea midfielder picks up a second yellow card and his marching orders.
45. Buonanotte picks the ball up and strides towards the box.
He cuts onto his left foot and bends one into the corner of the goal.
Sanchez had no chance with that one.
Gallagher has flown into a challenge on Gilmour, he is in trouble here.
43. The game has gone off the boil a little from a Chelsea perspective now.
They seemed to be in control but Brighton are dominating possession once again.
Pochettino will feel at ease somewhat in The Seagulls' ability to turn it into any clear cut chances in front of goal.
41. Mudryk comes alive in the middle of the park and does a neat Cruyff turn to lose his marker.
He charges towards goal and tries his luck from outside the box.
With Steele scrambling, the ball goes harmlessly wide of the post.
39. Adingra cuts inside from the left and looks to shoot.
It is high, wide and not so handsome.
As Chelsea look to play the ball out from the back, they get themselves in all sorts of trouble and the visitors almost capitalise.
37. Lallana looks to dance his way around the Chelsea midfield.
Caicedo goes clattering into him at the cost of a free kick.
The Chelsea midfielder was lucky not to see a yellow card for that one.
35. Adingra is penalised for offside once again.
The Brighton winger needs to time these runs far better if he is going to have any affect on this back line.
It is all too easy for them to step out and catch him every time.
33. Gallagher certainly isn't changing his game after that card.
His style of play is that he likes to be combative and challenge for everything.
He needs to be wary as one mis-timed challenge and he is walking.
That would change the whole complexion of this game.
31. Gallagher is finally shown a yellow card after his third foul.
He caught his man on the ankle with a poorly timed challenge.
The Chelsea midfielder is walking a tightrope for the rest of the game now.
29. It has been a positive start to the game for the hosts.
Two goals in a first half and Sanchez has yet to make a save.
Pochettino will be pleased with what he is seeing from his team.
27. Gallagher is penalised for a foul on the halfway line.
It comes to nothing as Adingra is caught offside.
Already you can see how much Brighton are missing Dunk in defence.
Sanchez almost allows the ball to roll under his foot as he looks to control it but fortunately he managers to recover and clear.
25. Roberto de Zerbi does not look a happy man on the touchline.
His side are in danger of folding like a house of cards currently.
They need to try and find a goal to get themselves back into this game sooner rather than later.
23. As the corner comes in, Jackson wins it at the back post and heads it back across goal.
Colwill wins the header and despite it being cleared, it had already crossed the line.
First senior goal for Levi Colwill for Chelsea.
