Zlatan Ibrahimovic was unable to make a winning return to Milan as the Rossoneri were held to a 0-0 draw by Sampdoria at San Siro on Monday.
Veteran striker Ibrahimovic rejoined Milan on a free transfer at the start of the window and made his first appearance as a second-half substitute.
Despite his introduction it was Samp who looked more dangerous and Stefano Pioli had goalkeeper Gianluigi Donnarumma and the profligacy of Manolo Gabbiadini to thank for things remaining level.
Milan, who lost 5-0 to Atalanta in their last game before the mid-season break, were unable to find a winner in the closing stages and remain 12th due to Hellas Verona's 2-0 win over SPAL on Sunday.