Arsenal overcame the dismissal of striker Nicklas Bendtner to beat Everton 4-1 away on Saturday and regain top spot in the Premier League after Manchester United had earlier lost 2-1 at West Ham United.
Everton were the better side in the first half and led through a Tim Cahill goal in the 19th minute as Arsenal, showing several changes, struggled to find their rhythm.
However, two goals for striker Eduardo da Silva, his first in the league, after 47 and 58 minutes turned things around.
After Bendtner had been sent off in the 74th minute, Emmanuel Adebayor got the third after a defensive mix-up and fellow substitute Tomas Rosicky banged in an injury-time fourth.
Arsenal, who had been knocked off their perch on Wednesday after drawing 0-0 at Portsmouth, return to the top on 47 points, two ahead of United and six clear of third-placed Chelsea, who beat Newcastle United 2-1.
Everton, who had Mikel Arteta sent off in the 84th minute for elbowing fellow Spanish midfielder Cesc Fabregas, remain sixth on 33 points.
