Produced a number of terrific saves over the course of the match, clawing away a Balotelli shot early on before throwing himself right to turn away a drive from Robinho shortly afterwards. Can count himself unlucky to have conceded twice, particularly as he kept out Mexes’ initial effort.
Was perhaps the least stretched of the defensive players, though the introduction of El Shaarawy after an hour certainly posed him problems. This was only his second match of the season after being suspended but showed few signs of rust.
Booked in the first half for a challenge that saw him go in with his studs raised, giving himself a potential headache for the rest of the game. Siena were largely solid through the center but ultimately lost his head just after Ambrosini’s red card and invited the referee to dismiss him.
Made a number of vital interceptions at the near post when deliveries came in from Siena’s left. His reading of the game was vital to prevent Abate’s crosses being more effective. Was clever in winning a number of cheap free kicks to relieve the pressure on his side.
Operated as the left wing back but struggled to pin down Abate when he pushed forward. Was reduced to a rather defensive role overall and struggled to have much of an offensive impact for his side.
Gifted the home side the lead midway through the first half with a textbook downward header from a Rosina cross. After a distinctly shaky start to the game defensively, this goal seemed to settle him down and though he was occasionally a little too keen to challenge the attackers, he was largely sound.
F. Della Rocca
Showed some nice skills at times on the left side of the midfield and delivered a handful of dangerous crosses that threatened to undo the visiting side. Seemed to lack a little pace defensively but held his position well when Milan played in front of him.
Was arguably the Siena midfielder who showed the most appetite to go forward and support the attacking players, yet his major contribution in this game was certainly defensive. Held his position well in a disciplined performance and was rarely beaten.
Seemed to be rather lost in the early stages of the first period but after Siena took the lead he gave a far more discipline performance. Sat behind the ball and offered a difficult obstacle to negotiate.
Worked hard offensively and caused Milan problems by his sheer volume of movement. Got away from Zapata rather easily on several occasions but rarely offered a direct threat to goal.
Supplied a wonderful cross for Siena to grab a shock lead and displayed a wide range of passing that threatened the Milan defense on several occasions. Was not simply a spectator defensively either and was found tracking back to the edge of his box more than once. A superb performance before being replaced.
Had little to do save pick the ball out of the net from Terzi's header. A very quiet game for the goalkeeper.
Failed to pick up the run of Terzi as Siena grabbed the lead. The Frenchman did not have a great deal of work to do but rarely looked especially comfortable. Made up for this by scrambling the vital goal late on.
M. De Sciglio
Was a good deal more conservative down the left than Abate was on the right flank. Only got forward on a handful of occasions and when he did he was rarely particularly effective. Would have expected to have been more of a force in this encounter.
After a rather dodgy start to the game defensively, the right-back proved to be arguably Milan’s most dangerous attacking player. He timed his runs forward down the flank superbly and he delivered a number of terrific deliveries into the box. A fine showing.
Had a difficult evening but used his strength and pace well to recover from difficult situations. Failed to deal with Siena’s opening goal in a proactive manner and lost Emeghara on occasion, but led well from the back.
Would have wanted to impose himself on this vital match from the outset of the game but took a while to grow into it. Switched play very well at times, creating chances behind Siena’s wing backs, but he was not consistent with his work and was ultimately disappointing.
Did not offer his side any particular offensive threat and had an evening to forget as his touch was frequently off and his passing somewhat errant. Needed to be a more telling influence for his side and was withdrawn with an hour played.
A player more noted for his work in the defensive area of the midfield, the Milan captain pushed forward more often than is his custom, which was perhaps a sign of his unease. Booked after an hour, which summed up the nervy performance he had defensively. Was somewhat harshly shown a second yellow midway through the second period.
The Brazilian’s future is the subject of speculation at present but he was very lively early in this encounter. Delivered a wicked cross after quarter of an hour that should have been converted by Niang. Disappeared thereafter.
Was clearly in the mood from the first minute, with a thumping early drive that needed to be well saved by Pegolo. Should have done better than to hit the bar with a close-range header after half an hour. The former Manchester City forward was the fulcrum of Milan’s attack but his passing was erratic, though he did tuck home a high-pressure penalty with consummate ease.
S. El Shaarawy
Brought on for the final 30 minutes and offered a lively threat in the Milan attack, nearly breaking the offside trap within seconds of his arrival. A big aid to his side's late improvement.
Came on at the break to add cutting edge but failed to perform the role the coach asked of him as he offered very little.