Milan, Feb. 17 -- Krzysztof Piatek looks to be firing AC Milan back into the Champions League.

The Poland international scored twice as Milan came from behind to beat Atalanta 3-1 in Serie A on Saturday. Piatek has four goals from three league starts since joining Milan from Genoa in January for a reported 35 million euros ($40 million). He also scored two in the Italian Cup for the Rossoneri.

"I always believe in myself and I know that I can always score," Piatek said. "But I admit that six goals in five games is a great number, more than I expected."

Piatek has netted 17 times in Serie A, leaving him just two behind Juventus forward Cristiano Ronaldo on the goalscoring chart.

Milan remained in fourth place and the final Champions Le...