Eden Hazard converted a second-half penalty to keep Chelsea's perfect home record intact with a 2-1 win over Queens Park Rangers in the Premier League.
Hazard was fouled by Eduardo Vargas and took the spot kick himself in the 76th minute at Stamford Bridge as Chelsea provisionally moved nine points clear of main title rival Manchester City ahead of its derby against Manchester United on Sunday.
Southampton beat Hull 1-0 to stay second with its seventh Premier League win of the season.
The Saints struck early at the KC Stadium when Victor Wanyama scored with a precise 35-yard strike in the third minute which went into the top left corner.
Earlier, Newcastle United, who made such a poor start to the season, won for the fourth match running when Spanish substitute Ayoze Perez scored 17 minutes from time to give them a 1-0 win over Liverpool.
Perez, who replaced the injured Papiss Cisse at halftime, smashed home from close range at St James' Park after defender Alberto Moreno failed to clear a loose ball in the box.
Newcastle failed to win any of their first seven league matches, but this was their third on the trot, after wins over Leicester and Tottenham, and followed their midweek Capital One (League) Cup win at Manchester City.
Newcastle 1-0 Liverpool
Arsenal 3-0 Burnley
Chelsea 2-1 QPR
Everton 0-0 Swansea
Hull 0-1 Southampton
Leicester 0-1 West Brom
Stoke 2-2 West Ham