Carlos Alcaraz kept his Wimbledon three-peat campaign chugging along by beating Jan-Lennard Struff 6-1, 3-6, 6-3, 6-4 on Centre Court to reach the fourth round.

LONDON — Carlos Alcaraz's first match on a grass court came just six years ago.

Carlos Alcaraz, locked in a five-set struggle at Centre Court, looked toward his coach Monday and shouted something about how Fabio Fognini — 38, retiring after this season,