Lautaro Martinez shot Inter Milan to a 1-0 derby triumph over crumbling champions AC Milan on Sunday but his team stayed 13 points behind Serie A leaders Napoli who strolled to a 3-0 win at Spezia.

Argentina forward Martinez headed home his 12th league goal of the season in the 34th minute at the San Siro to make sure that Inter remained in second place and plunge their local rivals even deeper into crisis.

A third straight league defeat leaves Milan in sixth and in a downward spiral that threatens to completely ruin a season which less than a month ago looked to be going more or less according to plan.

More details on SportsDesk. 

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