Chelsea secured a 2-1 Premier League win over Watford at Vicarage Road on Saturday.
Tammy Abraham opened the scoring after just four minutes with his 10th goal of the season in all competitions. He turned provider for Christian Pulisic in the 55th minute.
Gerard Deulofeu pulled one back from the penalty spot with 10 minutes of normal time remaining to set up a tense finish, but the Hornets were unable to complete a comeback.
Watford remain in the hunt for their first league win of the season, while Chelsea are up to third in the table.