Milan: Spanish midfielder Suso scored a brace to end his Serie A goal drought as AC Milan got back to winning ways after three consecutive draws with a 4-1 success which thwarted Sassuolo's bid to go second in Serie A on Sunday.
Champions Juventus had maintained their perfect start to the season on Saturday with a 3-1 win in their top-of-the-table clash with Napoli who remain in second place.
Juventus, with a maximum 21 points after seven games, are six points ahead of Carlo Ancelotti's team.
AC Milan needed to win to avoid losing further ground on their rivals, with Inter Milan, in fourth, after a 2-0 win over Cagliari, and AS Roma, in eighth, after a 3-1 derby win over city rivals Lazio.
Sassuolo dropped to fifth, equal on 13 points with Fiorentina and Inter Milan.
AC Milan's victory came despite the absence of star striker Gonzalo Higuain with forwards Patrick Cutrone and Fabio Borini also missing with ankle injuries.
Suso scored his first league goal since February five minutes after the break in Modena after Ivorian Franck Kessie had put Milan ahead with a brilliant solo run on 39 minutes.
Samu Castillejo added a third on the hour mark for Gennaro Gattuso's side before Filip Djuricic pulled one back for the hosts.
Suso got his second goal four minutes into stoppage time after consultation with the video assistant referee (VAR).
Milan remain tenth in the standings, four points off Inter Milan, who occupy the final Champions League berth.