Diego Costa controversially struck a late winner as Chelsea came from behind to beat Watford 2-1 on Saturday.
Having avoided a second booking for simulation in the second half at Vicarage Road the Spaniard took full advantage of referee Jon Moss’ reprieve, following up his winner against West Ham on Monday night with the decisive goal three minutes from time.
Etienne Capoue’s stunning 55th-minute volley had given Watford a deserved lead until Chelsea responded through summer signing Michy Batshuayi, who scored his first Premier League goal 10 minutes from time.
Walter Mazzarri stuck with the same Watford team that – despite Ben Watson’s late dismissal – ground out a 1-1 draw at Southampton on the opening day. Conte, meanwhile, replaced Willian for Pedro in what was his only change from Chelsea’s last outing.
Watford created the first opening as Miguel Britos’ scything pass played Jose Holebas through on goal, but Thibaut Courtois was equal to the Greece international’s strike on seven minutes.
The game ebbed and flowed in the opening exchanges as both sides enjoyed long spells of possession without threatening the opposition goal.
That was the case until 24 minutes, when Nodrin Amrabat bundled his way down the right flank, beat Cesar Azpilicueta and drilled a low ball into the Chelsea area.
Ighalo was poised to turn the ball home from six-yards, but Gary Cahill’s intervention was enough to see the Nigeria international loop the ball over the target.
Watford resumed strongly and broke the deadlock within 10 minutes. A floated ball into the Chelsea area found Capoue at the far post, and the Frenchman controlled on his chest before rifling high past Courtois for his second goal in as many games.
Conte’s use of his substitutions proved to be decisive. First Victor Moses injected pace and energy into the tiring Chelsea attack, before the introduction of Batshuayi and Cesc Fabregas, overlooked for the second week running, added quality in the final third.
When an unsighted Gomes was unable to gather Eden Hazard’s dipping drive, an eager Batshuayi was on hand to convert from close range for his first goal since his big-money summer move from Marseille.
Seven minutes later Fabregas’ inch-perfect through ball released Costa and he slotted the ball home under Gomes to complete the turnaround, which could have been made secure had Batshuayi found the net instead of rattling the underside of the Watford bar in added time.