Top 5 deals of the January transfer window

#2 Krzysztof Piatek

Krzysztof Piatek could prove to be the signing of the season

Krzysztof Piatek made a switch from Genoa to AC Milan for a sum of £31.5 million. The 23-year-old Polish international was eyed by many big clubs but Milan's offer was concrete.

Real Madrid C.F and Chelsea are teams that kept tabs on the Serie A sensation who has already netted 13 goals in 20 appearances this season in the league. Piatek caught the eye of big teams when he was seen locking horns with Cristiano Ronaldo to be at the top of goal scoring charts in Italy.

The Polish international has already made his debut for AC Milan after joining them this month and both his appearances for the Rossoneri have come against SSC Napoli. He played a cameo role as he was subbed in for the last 20 mins as AC Milan and SSC drew 0-0 in the league.

The second appearance was a knockout Copa Italia tie where he made the starting eleven. Piatek put in an impressive performance, scoring a brace that was enough to see off Napoli as Milan sealed the tie 2-0.

The former Genoa star can prove out to be a bargain for AC Milan if he can keep his goalscoring form in the games to come.