Manchester City, four points off the pace in fourth place, visit struggling champions Leicester City later.
Mesut Ozil's crafty header inspired Arsenal to a 3-1 comeback victory over Stoke City on Saturday as Arsene Wenger's side supplanted Chelsea at the Premier League summit.
Charlie Adam's penalty put Stoke ahead at the Emirates Stadium, but Theo Walcott equalised before Alex Oxlade-Chamberlain teed up Ozil to float a delightful header over Lee Grant in the 49th minute.
Alex Iwobi completed victory to lift Arsenal top on goals scored above Chelsea, who go in search of a ninth consecutive win against West Bromwich Albion on Sunday.
"We got a very unlucky penalty against us, because it is not even a foul in my opinion. But we have showed great mental strength," said Arsenal manager Wenger.
"It is down to us to maintain the focus and the desire to improve. We have a chance to fight at the top."
Manchester City, four points off the pace in fourth place, visit struggling champions Leicester City later on Saturday, while third-place Liverpool entertain third-bottom West Ham United on Sunday.
Arsenal went into their meeting with Stoke on the back of one-sided wins over West Ham and Basel, but the first half hour of the match suggested their luck might be about to turn.
First, Shkodran Mustafi was forced off by injury, which saw Hector Bellerin make an earlier than expected return from an ankle problem as a substitute.
Then, in the 29th minute, Adam celebrated his 31st birthday by giving Stoke the lead from the spot after Granit Xhaka had caught Joe Allen with his elbow.
The decision drew a furious reaction from Wenger, who appeared to push the fourth official.
But Arsenal levelled in the 42nd minute when Walcott neatly converted Bellerin's cross at the near post for his 10th goal of the season, before Ozil put the home side in front.
Arsenal needed a two-goal win to claim top spot and the crucial third goal duly arrived 15 minutes from time when Nigerian winger Iwobi gathered Alexis Sanchez's pass before drilling home.
Italian striker Stefano Okaka scored his first Watford goals as Walter Mazzarri's side came from behind to beat Everton 3-2, leaving Ronald Koeman's men with one win from their last 10 league games.
Romelu Lukaku netted twice for Everton, bookending the scoring, but Okaka's double -- the first a brilliant volleyed flick -- and a Sebastian Prodl header earned the hosts victory.
Watford leapfrog Everton to seventh place, level on points with Manchester United, who host fifth-place Tottenham Hotspur on Sunday.
Swansea City climbed off the foot of the table at Sunderland's expense with a 3-0 home win over the north-east club in which Spain international Fernando Llorente scored twice.
Gylfi Sigurdsson broke the deadlock with a 51st-minute penalty, awarded for handball against Jason Denayer.
Sigurdsson's corner set up Llorente to add a second and the former Athletic Bilbao striker made the game safe from Jefferson Montero's cross to propel Bob Bradley's men clear of the bottom three.
"It's good work. We're proud of it," Bradley told Sky Sports. "We've talked about how we need to be good at the Liberty (Stadium). There's continued work."
Wilfried Zaha, the subject of an international tug of war between England and Ivory Coast, starred as Crystal Palace rescued a point in a topsy-turvy 3-3 draw at fellow strugglers Hull City.
Robert Snodgrass's 27th-minute penalty put Hull ahead, but Zaha won a spot-kick that Christian Benteke coolly converted before dancing past Tom Huddlestone and Sam Clucas to slam Palace in front.
Adama Diomande equalised and Jake Livermore gave Hull an 78th-minute advantage, only for Zaha to tee up Fraizer Campbell for a headed 89th-minute equaliser.
Jeff Hendrick's brilliant 13th-minute volley set Burnley on the path to a 3-2 home win over Bournemouth.
The Irishman netted from 25 yards and further goals from Stephen Ward and George Boyd secured victory despite Benik Afobe and Charlie Daniels netting for the visitors.