Ismael Bennacer's first-half goal gave AC Milan a slender advantage over Napoli in the first leg of their all-Italian Champions League quarter-final.

The Algeria midfielder struck home from the edge of the area after Braham Diaz broke superbly on the halfway line.

Napoli had Andre-Frank Zambo Anguissa sent off in the second half and were well held by an organised Milan.

Milan also came close to a second goal when Simon Kjaer's header bounced off the underside of the bar.