Diego Costa scored the winner for the second game in a row as Chelsea came from behind to beat Watford 2-1 at Vicarage Road, thanks to goals from Michy Batshuayi and Diego Costa.
Watford looked to be on course for just their second home victory over the Blues in Premier League history after Etienne Capoue opened the scoring with his second goal in as many matches.
The midfielder’s left-footed drive 10 minutes into the second half looked like earning the Hornets their first win over Chelsea in all competitions since 1999, but an inspired second half turnaround instead preserved the visitors’ 100% record in 2016/17.
But substitute Michy Batshuayi equalised with his first goal for Chelsea since his £33m move.
Then Costa ran on to substitute Cesc Fabregas’ pass and slid the ball under Heurelho Gomes with three minutes left.
The win gives Chelsea boss Antonio Conte a 100% start in the Premier League after Monday’s victory against West Ham.