Milan 3 Atalanta 1,PATO PATO BORRIELLO

Milan: Abbiati; Bonera, Nesta, Thiago Silva, Jankulovski; Beckham, Pirlo, Ambrosini (Gattuso 66); Pato (Abate 80), Borriello (Huntelaar 74), Ronaldinho

Atalanta: Consigli; Garics, Bianco, Manfredini, Bellini; Ferreira Pinto (Ceravolo 42), De Ascentis (Volpi 67), Padoin, Valdes; Doni; Tiribocchi (Chevanton 76

An injury to Pato took the gloss off AC Milan's 3-1 victory over Atalanta with the Brazilian striker now facing an anxious race against time to be fit for the Champions League return leg against Manchester United.

Pato scores the first of his two goals but a thigh injury took the gloss off Milan's win over Atalanta

The forward produced a neat turn and finish on the half hour before converting Ronaldinho's pass 11 minutes later. Jaime Valdes netted for the visitors after the interval but Marco Borriello was quick to restore Milan's two-goal advantage after Ronaldinho's penalty was saved.

"We will have to wait 24 to 48 hours before knowing the extent of the injury,'' said Milan vice-president Adriano Galliani after the game. Milan must overturn a 3-2 deficit if they are to progress to the quarter-finals of the Champions League.

"Not to have Pato would be terrible,'' said Galliani. "We don't have anyone who can replace him. Without him, we would need to change our tactical set-up.''

Milan vs Siena

MILAN: Dida; Abate, Nesta, Thiago Silva, Antonini; Gattuso, Pirlo, Flamini; Beckham, Borriello, Ronaldinho.
SIENA: Curci; Rosi, Terzi, Brandao, Del Grosso; Vergassola, Codrea, Ekdal, Rossi; Jajalo, Maccarone.

At San Siro it finished Milan-Siena 4-0. In the first half the Rossoneri took the lead through a penalty converted by Ronaldinho, and in the 28th minute Borriello doubled the score with a splendid goal. In the second half the Rossoneri scored again in the 72nd and 89th minutes with Ronaldinho, who scored his first hat-trick with the Rossoneri.