The gap behind the full-back

Napoli opened with a 4-3-3 against Arsenal. Di Lorenzo pushed high on the right, Politano stayed wide, and the space behind him was left for the covering midfielder. Arsenal found it early.

Gyokeres drifted into that channel twice in the first ten minutes. White waited, Rice stepped across, and Napoli's midfield never slid quickly enough. The ball kept reaching the edge of the box from that side.

Allegri changed nothing at half time. By the 75th minute, Odegaard had time to pick his spot from outside the area because the same gap had widened. The shape told the story before the goal did.

Look where the full-back stands, then look who is supposed to cover him.

Question: When a right-back pushes high, should the winger drop or the central midfielder slide across?