Made one excellent save to deny Denis, and commanded his area well. Didn't have a great deal to do in the first half, but remained alert.
Offered plenty of energy down the left flank, and was key in Milan's breakthrough goal, carrying the ball from his own half to ensure that the breaking hosts had the numerical advantage.
Strong in the air and didn't allow for Denis to have a great deal of joy, as the Argentine was rather isolated against the Rossoneri defensive line.
M. De Sciglio
Worked hard down the right hand side, always offering himself as an option, but his crossing delivery wasn't consistent. A steady outing.
His pace was key in preventing Denis from equalising, as the Colombian hared back to deflect the Atalanta hitman's effort from testing Abbiati, when it looked to be a certain goal.
Worked hard in the centre of midfield, but squandered a great chance to score, nodding a point blank header into the arms of Consigli.
Capped his first Serie A start with a fantastic goal, a low drive from range which clipped the foot of the post on its way into the back of the net. Inventive, yet slightly raw, the 18-year-old was impressive.
Scored his 100th and 101st goals for Milan, with the first being an excellent finish, and the second alleviating pressure from Allegri's men. Searched for his hat-trick, but was denied by Consigli.
N. de Jong
Dropped into the centre of the two centre-backs to allow Milan to dominate in the first half, and proved useful during Atalanta's period of control, as his tenacity helped to repel the opposition in the midfield third.
Involved throughout for Milan, but lacked a cutting edge to his game. Provided plenty of crosses, but it wasn't quite his day, despite an energetic performance. Unwittingly cushioned the ball down for Kaka's second.
A somewhat disappointing display from the lone striker, as his lack of agility and pace prevented him from getting in behind. Bright in the first half, but faded as the game wore on.
Made several good saves, denying Kaka his hat-trick and keeping Balotelli at bay in the second half. Could do nothing about the goals.
Was bright in the first half, breaking down the left to deliver a few dangerous crosses, but faded in the second 45 minutes.
Acted as a marauding right-back in his first appearance for the club, offering himself as an outlet and option throughout, and had a goal ruled out for a possible push on Mexes.
Made a few interceptions, but was off the pace somewhat. Could deal with Matri, but not the onrushing runners from Milan's midfield.
Struck the post with a ferocious effort, with a slight deflection off De Jong preventing it from arrowing into the top corner. Wasn't afraid to shoot.
Had a couple of first-half efforts, but failed to hit the target. Wriggled away from De Sciglio on occasion, but generally didn't see much of the ball.
His free kick execution was poor, but he provided a few inventive crosses, one which was somehow turned away by Zapata, rather than assisted a consolation goal.
Provided a good knock-down for Denis at the start of the second half, and buzzed around as Atalanta dominated the opening stages of the second period. Aside from that, the Argentine was subdued.
Made two key clearances to prevent the scoreline from getting embarrassing for the visitors, the second of which denied Kaka another opportunity to grab his third.
Had two good opportunities, one of which he fired over the bar, the other was charged down excellently by the recovering Zapata. Didn't have the service.
Made a few strange decisions to drive into the box instead of delivering crosses, but the midfielder provided the fresh legs Milan needed to see out the win.
Tested Consigli on two occasions, and provided the cross in the build up to Kaka's second goal. Not at his sharpest, given his illness, but made a decent impact.
Replaced Carmona in the first half, and worked hard to try to prevent the likes of Kaka and Cristante from wriggling in between the lines.
G. De Luca
Tested Abbiati not long after coming on with a low drive, but was otherwise anonymous.
Fired wide of Abbiati's far post and provided a couple of useful direct passes, in what was otherwise something of a cameo for the veteran.