Manchester City returned to the top of the Premier League by drawing 0-0 away to Manchester United in a disappointing local derby on Sunday.
They have 22 points, the same as Arsenal, but a better goal difference.
United stay fourth, two points behind, with West Ham United also above them. They came closest to a goal when substitute Jesse Lingard hit the bar six minutes from the end.
City had won six of the previous eight league derbies, but like the home side found chances hard to come by this time.
Harry Kane scored a hat-trick for Tottenham Hotspur, who moved into the top six of the Premier League with a resounding 5-1 victory away to Bournemouth in the first league meeting between the clubs on Sunday.
The home side, playing their first season in the top-flight, took the lead in the first minute through Matt Ritchie, but England striker Kane equalised from a penalty eight minutes later.
Mousa Dembele and Erik Lamela had Spurs 3-1 ahead by half-time and Kane completed his hat-trick with two more goals in seven minutes.
Bournemouth’s third defeat in four games left them fourth from bottom, two points above the relegation places.