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Inter's victory at Stadio Carlo Castellani sees it close the gap on Serie A leader Napoli to four points.

Empoli faced an uphill battle when Saba Goglichidze was shown a red card for a studs-up high challenge on Marcus Thuram after half an hour, and Inter made the extra man count in the second half.

Frattesi found the net five minutes after the break and doubled Inter's lead in the 67th minute, before Martinez rounded off the win 11 minutes from time, stretching Empoli's winless run to five games.

Inter, unbeaten in five league games, remains second in the standings with 21 points, behind Napoli on 25 after its 2-0 win at AC Milan. Empoli remains 11th on 11 points.