6.48pmOne of the most successful teams in European history against one of the top sides from Holland - it doesn't seem right that two illustrious sides such as these should be scrapping it out for a Champions League place. But that is exactly what is going to happen in around 55 minutes' time.
6.50pmBoth clubs have been a shadow of their previous success over recent years, which has resulted in them being paired together in the playoff draw. The victor of the tie will progress through to the group stage, while the losers will have the consolation prize of a spot in the Europa League.
6.53pmAs ever, we will be all over the breaking team news as soon as we get it, but with the tie in the balance, I would expect both managers to go with their most experienced lineups.
6.56pmThe first leg at the Philips Stadion proved to be a competitive affair. Milan looked in control after netting an away goal through Stephan El Shaarawy, but PSV striker Tim Matavz handed his side a lifeline ahead of tonight's second leg.
6.58pmAC MILAN XI: Abbiati; Abate, Mexes, Zapata, De Sciglio; De Jong, Montolivo, Muntari; Boateng, Balotelli, El Shaarawy
7.04pmSo then, what do we make of those two selections? Most of the focus will be on Milan's attacking threat, with El Shaarawy likely to pull the strings in the San Siro, while PSV will look to Park and Maher to showcase their class in helping their side upset the Serie A club.
7.08pmThis tie is not the only one that will come to a conclusion tonight. Celtic host Shakhtyor Karaganda as they look to overturn a 2-0 deficit, while Lyon are in the same boat against Real Sociedad.
7.14pmMilan will be looking to maintain their city's inclusion in Europe's premier competition when they step onto the pitch this evening. The last time that neither AC or Inter failed to qualify for the group stages was the 2001-02 season.
7.20pmAC MILAN SUBSTITUTES: Amelia, Robinho, Poli, Nocerino, Silvestre, Emanuelson, Niang
7.26pmBoth teams can boast notable firepower on their respective benches. Robinho may not be the player of five years ago, but he still has the ability to conjure up some magic should his side need it. As for PSV, Ola Toivonen possesses a fine scoring record and will almost certainly make an appearance later in the match.
7.31pmAs with the majority of Europe, both clubs have began their domestic campaigns. Milan started Serie A with a 2-1 defeat to Hellas Verona at the weekend, while PSV have recorded 10 points from their opening four fixtures in Eredivisie.
7.34pmPREDICTION! Milan are the favourites to progress, but I am expecting a really entertaining encounter this evening. PSV have players that can punish Milan if any of their stars fail to turn up. I am predicting goals this evening, and I reckon Milan will run out 3-2 victors.
7.37pmThere's already an electric atmosphere inside the San Siro. The home supporters might have an important part to play as the evening goes on.
7.41pmThe eagle-eyed amongst you would have noticed that PSV's centre-back pairing consists of two former Premier League players. Jeffrey Bruma made nine appearances for Chelsea, while Karim Rekik is currently on loan from Manchester City.
7.43pmThe two teams are currently going through the pre-match pleasantries. Kickoff is just around the corner.
0 minEnglish referee Mark Clattenburg gets us underway.
3 minPositive start from Milan, who manage to get a low cross into the box, but it is claimed by the goalkeeper.
5 minMilan are really stamping their authority on proceedings in the early stages. They haven't managed to get a shot away, but they are keeping PSV away from the ball.
7 minThat's better from PSV, who register the first attempt on goal of the match through Matavz, but his header from eight yards was clawed away by Abbiati.
10 minFirst blood to Milan, who take the lead through Kevin-Prince Boateng. The former Portsmouth midfielder was given far too much time and space on the edge of the penalty area, before driving the ball into the bottom corner.
13 minMilan certainly have the momentum now, and they are pushing for a second. El Shaarawy has looked lively on the ball, and he went close with a curling effort from 20 yards out.
16 minIt's vital that PSV manage to weather the storm, or else this match could be soon done and dusted. The Dutch outfit are struggling to spend any prolonged time on the ball, and as a result, Milan are piling on the pressure.
19 minWe haven't seen much of Balotelli, but he introduces himself into the match with a burst from the centre circle before firing the ball harmlessly over the crossbar.
21 minEFFORT! In the words of Ray Wilkins, my word. What a volley from Maher. The Dutch Under-21 international received the ball around 30 yards out, before unleashing a shot that seemed destined for the top corner before Abbiati threw out a hand to claw it out.
24 minThe boos from the Milan supporters will be music to the ears of PSV. They are making more of an impression on the overall play of the game.
28 minThere doesn't seem to be much love lost between Rekik and Balotelli, who used to be teammates at Manchester City. Rekik has let the striker know that he is about on several occasions, and I think Balotelli has had enough. Watch this space.
30 minMilan show a bit more threat going forward through Montolivo, but his volley from an acute angle flies into the side-netting.
32 minWOODWORK! So unlucky! De Sciglio plays a fine cut-back to El Shaarawy who is 10 yards out, and his first-time effort rattles the underside of the crossbar, comes back down on the line and bounces clear. It was close, but I don't think that it went over.
35 minImpressive response from PSV through Depay, who sees a driven 25-yard effort bounces past the post.
39 minThis is an important few minutes for PSV. If they can get into half-time just the one goal behind, they will fancy their chances of nicking an away goal after the break.
41 minCHANCE! Milan should be 2-0 up. The ball was well-worked down the right-hand side for Montolivo to cross for Balotelli, but the striker could only glance his header several yards wide.
43 minBOOKINGS! Well that was all a little bit needless. Montolivo and Schaars go into the referee's notebook after a bit of handbags over nothing.
45 minThere will be one minute of added-on time...I think.
45+2 minBalotelli has won a free-kick just before the half time whistle. He opts to shoot from 35 yards out, but it is well held by Zoet.
8.34pmWell that was a pretty entertaining 45 minutes, wasn't it? AC Milan have the lead but it has been anything but straightforward for them. PSV are by no means out of this.
8.40pmI doubt that PSV coach Phillip Cocu will make any alterations just yet, but as I alluded to before kickoff, he has Ola Toivonen waiting in the wings. Expect to see him if his side haven't netted in the opening 20 minutes of the second half.
8.43pmThe good news for Celtic fans is that their side have pulled a goal back in their crucial clash with Shakhtyor Karaganda. They still need to net at least one more though...
47 minCHANCE! Oh my, what a chance for PSV! The ball was sent into the penalty area, and it found its way to Wijnaldum at the back post. He takes his time, before volleying the ball straight at Abbiati, who pulls off a superb stop! Should be 1-1. It's all PSV in the opening two minutes.
51 minMilan are well and truly on the defensive here. PSV are having plenty of time on the ball to play it out from the back with purpose. You feel as those they need to capitalise on this momentum though.
52 minBOOKING! Bruma is the second PSV man to enter the book after clattering into Balotelli on the halfway line.
53 minCHANCE! After all of PSV's pressure, it should be 2-0 to Milan. Balotelli flicked the ball on for El Shaarawy, but he could only divert the ball inches past the post from 12 yards.
54 minGOAL! AC Milan 2-0 PSV Eindhoven (Balotelli)
55 minWhy always him? A corner is swung into the box, which is flicked on by Mexes for Balotelli to poke a leg out to send the ball into the roof of the net. That could be game over for PSV, who will feel very hard done by.
57 minWell that takes extra-time out of the equation. PSV need two goals in the next half hour or else they will be heading into the Europa League.
61 minSUBSTITUTION! Jozefzoon is on in place of Park, who has hardly featured at all for PSV.
62 minBOOKING! Balotelli joins Montolivo in Clattenburg's notebook after sliding in late on Jozefzoon. The resulting free-kick was easily cleared by Milan.
67 minI'm a bit surprised that we haven't seen any sign of Toivonen. It's all gone a little bit quiet for PSV, who need to be placing a bit more emphasis on attack.
69 minSHOT! Schaars does superbly on the right-hand side before firing a decent effort at Abbiati, who tips the ball over. Here comes Toivonen, who replaces Maher.
72 minBalotelli has just received some treatment after appearing to twist his knee on the touchline. He's back up, but I can't see him continuing.
74 minSUBSTITUTIONS! Changes for both sides. El Shaarawy makes his exit for Andrea Poli, while Locadia replaces Depay for PSV. Just over 15 minutes remaining in the San Siro.
78 minGame over. Balotelli, who looks to have recovered from that knee niggle, plays a fine ball through to Poli, who shows excellent vision in locating Boateng on the edge of the penalty area. The Ghanaian shuffles past the defender before scuffing his shot into the far corner.
81 minThat goal was a bit harsh on PSV, but Milan deserve their victory, simply after showing more quality in front of goal. Their defence looks a bit shaky, but they have the game to beat anyone in the group stages.
84 minCeltic are currently locked at 2-2 in their match at Celtic Park. You can follow the action in Scotland by clicking here.
86 minSUBSTITUTION! Milan make a late change by bringing on Robinho for Boateng. Not a bad player to have up your sleeve.
90 minThere will be three minutes of added-on time at the end of the 90 minutes.
90+1 minAs the match peters out, it's worth noting that Mark Clattenburg has had a very good game tonight. Those are words that I never thought that I would write...