Chelsea collected their first Premier League victory under new head coach Enzo Maresca with an emphatic 5-1 win over West Ham United at the London Stadium on Friday night. The visitors overturned an early deficit, scoring five unanswered goals after Lucas Paquetá had put West Ham ahead in the sixth minute. Joao Pedro levelled from a corner on 15 minutes before providing the pass for Pedro Neto to complete the turnaround eight minutes later. Teenage winger Estevão, promoted to the starting XI when Cole Palmer suffered a pre-match groin issue, set up Enzo Fernández for the third on 34 minutes, becoming the youngest Chelsea player to register a Premier League assist at 18 years and 120 days. Moisés Caicedo marked his 100th Chelsea appearance by converting a loose ball from a 54-minute corner, and Trevoh Chalobah added the fifth four minutes later. West Ham supporters streamed out well before full time, underscoring growing frustration with manager Graham Potter after a second successive defeat to open the season.