90' It's 3 - 1 as the referee blows for full-time.
90' Arsenal drive upfield and Mohamed Elneny gets in a shot. The strike is blocked by a AC Milan defender.
90' Aaron Ramsey (Arsenal) gets in a strike but the shot is blocked by a defender.
90' 2 minutes of injury time will be added to the second half.
89' Important block from the Arsenal defence as Nikola Kalinic fires in a strike for AC Milan.
89' Arsenal are coming forward and Jack Wilshere gets in a strike, it misses the target, however.
86' Aaron Ramsey (Arsenal) strikes at Emirates Stadium but his header is cleared.
86' Goal! Danny Welbeck extends Arsenal's lead to 3 - 1 in London with a header.
82' AC Milan push forward at Emirates Stadium and Manuel Locatelli gets in a strike. This is blocked, however, by a determined Arsenal defence.
82' Corner awarded to AC Milan.
79' Arsene Wenger is making the team's third substitution at Emirates Stadium with Sead Kolasinac replacing Mesut Ozil.
79' The away team have replaced Franck Kessie with Manuel Locatelli. This is the third substitution made today by Gennaro Gattuso.
77' AC Milan are pushing forward but Suso's finish is wide of the goal.
77' AC Milan push upfield and Andre Silva gets his head to the ball. The attempt is cleared by an alert Arsenal defence.
77' AC Milan have been awarded a corner by Jonas Eriksson.
76' Hector Bellerin is writhing in pain and play has been suspended for a few moments.
76' Play has been resumed at Emirates Stadium.
76' Hector Bellerin returns to the field for Arsenal after picking up a slight injury.
71' Great play from Aaron Ramsey to set up the goal.
71' Granit Xhaka puts the ball in the net and the home team now lead 2 - 1.
70' Giacomo Bonaventura is replacing Hakan Calhanoglu for the away team.
69' Arsenal make their second substitution with Mohamed Elneny replacing Henrikh Mkhitaryan.
68' AC Milan's Nikola Kalinic goes close with his head but his effort is blocked.
67' Nikola Kalinic is on a sub for Patrick Cutrone for AC Milan.
67' Arsenal have been awarded a corner by Jonas Eriksson.
65' Riccardo Montolivo of AC Milan gets in a strike, but is off target.
65' Corner awarded to AC Milan.
61' Suso (AC Milan) has received a yellow card from Jonas Eriksson.
59' AC Milan's Patrick Cutrone misses with an attempt on goal.
56' Arsenal's Aaron Ramsey gets his shot away but it misses the target.
54' AC Milan's Suso breaks free at Emirates Stadium. But the strike goes wide of the post.
52' In London, AC Milan push forward quickly but are pulled up for offside.
51' Arsenal surge into the attack at Emirates Stadium but Shkodran Mustafi’s header is off-target.
51' Corner awarded to Arsenal.
50' Henrikh Mkhitaryan gets his shot on target but fails to score for Arsenal.
49' Arsenal's Aaron Ramsey gets in a shot on goal at Emirates Stadium. But the effort is unsuccessful.
48' Franck Kessie for AC Milan drives towards goal at Emirates Stadium. But the finish is unsuccessful.
46' The second-half has just kicked-off.
45' The ref's whistle signals the end of the first-half.
45' Nacho Monreal (Arsenal) gets a yellow card.
45' In London Arsenal drive forward through Jack Wilshere. His shot is on target but it's saved.
45' Henrikh Mkhitaryan (Arsenal) is first to the ball but his header is off-target.
45' 2 minutes will be added to the first half in London.
44' AC Milan are whistled for offside.
44' AC Milan have been awarded a corner by Jonas Eriksson.
42' Fabio Borini for AC Milan has been booked by Jonas Eriksson and receives a first yellow card.
41' Corner awarded to AC Milan.
40' Alessio Romagnoli (AC Milan) has been booked and must now be careful not to get a second yellow card.
39' At Emirates Stadium, Gianluigi Donnarumma has been yellow-carded for the away team.
39' Goal! Danny Welbeck makes it 1 - 1. The equalizer came in the form of a penalty.
38' The ref points to the spot, it's a penalty for Arsenal.
37' Arsenal drive forward and Aaron Ramsey gets in a shot. Without netting, however.
35' That's a fine assist from Ricardo Rodriguez.
35' Goal! AC Milan have got their heads in front thanks to a Hakan Calhanoglu strike.
33' AC Milan are caught offside.
30' Arsenal have been awarded a corner by Jonas Eriksson.
25' AC Milan are too eager and fall into an offside trap.
25' Arsenal's Danny Welbeck is on target but unsuccessful.
24' AC Milan have been awarded a corner by Jonas Eriksson.
18' AC Milan push upfield but Jonas Eriksson quickly pulls them for offside.
12' Laurent Koscielny is back on the pitch.
11' Calum Chambers (Arsenal) has replaced the possibly injured Laurent Koscielny at Emirates Stadium.
11' The match in London is underway once more.
10' Laurent Koscielny is down and play has been interrupted for a few moments.
8' Arsenal advance rapidly upfield but Jonas Eriksson blows for offside.
5' Arsenal's Laurent Koscielny attacks the ball with his head but his effort fails to hit the target.
5' Corner awarded to Arsenal.
1' Andre Silva for AC Milan gets in a strike but fails to hit the target.
1' Today's referee, Jonas Eriksson, has blown to start the match.
The big names in today's match at Emirates Stadium have now been confirmed.
It is reported that 58973 spectators are in attendance today.