Manchester City took over at the top of the English Premier League table after winning 2-0 against Newcastle United in a tempestuous encounter at St. James' Park, with Edin Dzeko and Alvaro Negredo claiming City's goals.
It was City's sixth consecutive league win and lifted them above Chelsea at the summit, although they will lose their hold on first place if Arsenal win at Aston Villa on Monday.
"It was a very difficult game and it's a very big result as we know it's a tough place to come and win," City manager Manuel Pellegrini said, who also lost Samir Nasri to what he described as a "serious" knee injury.
Bidding to avenge a 4-0 defeat at City on the season's opening weekend, Newcastle began at a high tempo, but it took the visitors less than eight minutes to make the breakthrough.
David Silva released Aleksandar Kolarov with an incisive pass down the inside-left channel and the Serbian left-back delivered a low cross that was clipped home by Dzeko.
Hart kept Newcastle at bay in the second half, saving well from Yohan Cabaye and Loic Remy, before City midfielder Nasri had to be stretchered off following a wild, knee-high foul by Mapou Yanga-Mbiwa.
After Fernandinho had hit the bar with a header, Negredo sealed victory for City in the fifth minute of stoppage time when he ran the ball into the net after seeing an initial attempt blocked by Tim Krul.
Liverpool top Stoke in eight-goal thriller
Liverpool beat Stoke City 5-3 in an enthralling match to return to the top four and claim their first league victory at the Britannia Stadium at the sixth attempt.
A fifth-minute Ryan Shawcross own goal and an opportunistic Luis Suarez effort put the visitors 2-0 up, only for Stoke to draw level before half-time through Liverpool old boys Peter Crouch and Charlie Adam.
Crouch reduced the arrears with a deft header from a Marko Arnautovic cross, before Adam drove a rasping drive past Simon Mignolet from outside the area.
However, after Marc Wilson had been penalised for felling Raheem Sterling, much to the disgust of the Stoke supporters, Steven Gerrard restored Liverpool's lead from the penalty spot in the 51st minute.
Daniel Sturridge made his return from a seven-week injury lay-off as a substitute and he neatly teed up Suarez for his second goal - and 22nd of the campaign - with 19 minutes to play.
Jon Walters gave Stoke hope by squeezing a shot past Mignolet in the 85th minute, but Sturridge beat Jack Butland at the second attempt two minutes later to finally put a breathless game to bed.