The right-back moves inside

Watch Milan's build-up against Lecce. Mario Gila starts at right-back, then drifts inside next to the centre-backs. That one movement pulls the Lecce winger narrow, and suddenly Chukwueze has the whole touchline to himself -16.

The passing lane that disappeared was the one into the winger's feet. The lane that opened was the switch to Chukwueze in space.

Against Sassuolo, watch whether Gila keeps stepping inside or stays wide. If he tucks in again, the space behind him belongs to Sassuolo's left winger. One run into that channel and Milan's back four is stretched.

The first five minutes show you whether the full-back is a defender or a midfielder today.

Question: When Gila moves inside, who should cover the space he leaves?