Chelsea dropped their first points of the season on Sunday in a 0-0 draw at West Ham United.
The result put Maurizio Sarri‘s team two points behind Liverpool, who now sit solely at the top of the Premier League.
Chelsea hogged the ball in the first half but West Ham were dangerous when they were able to break out, Michail Antonio proving a real handful.
After a cagey opening spell, Chelsea established control but the home side could have taken a lead against the run of play just before the half hour when Felipe Anderson seized on a loose ball and played in Antonio, who blasted over with his left foot.
The match fell into a similar pattern in the second half, Chelsea searching for openings around the West Ham box but Felipe Anderson and Yarmolenko looked dangerous when the home side broke forward.
Substitute Alvaro Morata went close to breaking the deadlock moments after coming on only to see Lukasz Fabianski pull off a stunning stop from close range.
But with about 13 minutes to go West Ham had a wonderful chance to win the match, when the unmarked Yarmolenko headed just wide at the far post after a cross by Robert Snodgrass.
Fabianski pulled off another fine save as the clock ticked into injury time, diving to his left to deny substitute Ross Barkley and Willian blazed wide as Chelsea applied intense late pressure.
Elsewhere, two goals in three second-half minutes gave Arsenal victory over Everton took them up to sixth in the Premier League table.
After a tight first-half that’s aw Petr Cech pull off a number of saves to keep the Gunners in, Alexandre Lacazette swept a curling shot into the top corner from the edge of the area after Aaron Ramsey’s pass.
Shortly after, Pierre-Emerick Aubameyang poked in from close range after Mesut Ozil broke down the right, cut the ball back and Ramsey nudged it into the path of the Gabon international.
It’s a fourth straight win for Unai Emery’s men who now move level on points with London rivals Tottenham Hotspurs, and two points clear off seventh-placed Manchester United.