JOIN USChelsea manager Antonio Conte declared his side's Premier League title defence over after Marko Arnautovic's goal condemned the champions to a 1-0 defeat at West Ham United on Saturday.
Chelsea's defeat, their first in eight league games, left them 11 points adrift of leaders Manchester City, who visit second-placed Manchester United in Sunday's Manchester derby.
"We have to consider that this is the fourth game we've lost in 16 games," Conte told Sky Sports at the London Stadium. "In my previous experience, it won't be possible to fight for the title. With four defeats in 16 games, we must have another target."
Elsewhere, Tottenham Hotspur ended a run of four games without victory with a thumping 5-1 home win over Stoke City at Wembley in which Harry Kane scored twice.
Having previously been beaten by Burnley, Manchester City and Crystal Palace, Chelsea have lost just one fewer game than in the entirety of their triumphant 2016-17 campaign.
Austria international Arnautovic struck in the sixth minute, neatly exchanging passes with Manuel Lanzini and cutting inside Cesar Azpilicueta before curling a low shot past Thibaut Courtois.
Alvaro Morata squandered Chelsea's best chance of an equaliser when he slashed wide from N'Golo Kante's through ball with seven minutes remaining.
It was West Ham's first win in nine league games and confirmed the progress they have made under new manager David Moyes, who saw his side narrowly beaten 2-1 at Manchester City last weekend.
West Ham remain in the relegation zone, but they are now level on points with fourth-bottom West Bromwich Albion, who lost 1-0 at Swansea City in Alan Pardew's second game as manager.
Wilfried Bony scored for the second game running to lift Swansea off the foot of the table.
Spurs claimed a fourth successive four-goal win over Stoke. Son Heung-Min's cross was deflected in via Stoke defenders Kurt Zouma and Ryan Shawcross to put Spurs ahead and Son made it 2-0 by rattling in a pass from Dele Alli in the 53rd minute.
Kane's two goals -- a header from a Ben Davies cross and a left-foot curler -- took his tally for the season to 18 in all competitions and Christian Eriksen completed the rout.
Real Madrid win
Real Madrid sent a warning to Barcelona just two weeks ahead of El Clasico by storming back into form as Cristiano Ronaldo scored twice in a 5-0 thrashing of Sevilla on Saturday.
Sevilla had started the afternoon on the same number of points as Madrid in joint fourth, but the sides looked worlds apart as Real scored all five goals before half-time to close to within five points of Barca at the top of the table.
Nacho got the hosts off to a perfect start before Ronaldo doubled his La Liga tally for the season with a cool finish and a penalty inside the half mark.
Toni Kroos and Achraf Hakimi rounded off the rout as Real leapfrogged cross-city rivals Atletico Madrid into third.