Louis Saha and former Arsenal hitman Emmanuel Adebayor put the visitors into a 2-0 lead but Arsenal were level before the break through Bacary Sagna and Robin Van Persie strikes.
Tomas Rosicky then put Arsenal in front just after the break and the rout was completed by a quickfire double from Theo Walcott.
Arsenal now sit seven points behind their rivals and are level with Chelsea on points as their quest for
fourth place continues.
Meanwhile, Ryan Giggs marked his landmark 900th appearance for his club with a dramatic injury-time winner as Manchester United beat Norwich City 2-1.
United closed the gap once again to two points behind rivals City at the top of the league, but they left it late after Grant Holt had equalised for the home side, cancelling out Paul Scholes opener.
But in typical United fashion, it was their veteran of 21 years who popped up to steal all three points for the champions, turning in Ashley Young’s cross a minute from time, to spark wild celebrations in the away end.
Elsewhere, league-leaders Manchester City easily disposed of Blackburn Rovers 3-0 at the Etihad Stadium.
Goals from Mario Balotelli, Sergio Aguero and Edin Dzeko were enough to maintain City’s strangle-hold on top spot.
Andre Villas-Boas lifted some of the pressure on him and his Chelsea side as they beat Bolton 3-0 at Stamford Bridge.
Three second-half goals from David Luiz, Didier Drogba and Frank Lampard ensured Chelsea kept up
with Arsenal in the hunt for fourth place.
Terry Connor’s first game in charge of Wolves was a tale of two halves, as his side came back from 2-0 down at the break to earn a share of the spoils with Newcastle United at the Sports Direct Arena.
Newcastle United threw away a two-goal lead against Wolves to draw 2-2, while West Brom demolished Sunderland 4-0.
An early goal from Pavel Pogrebnyak earned Fulham a 1-0 victory over Queens Park Rangers at Loftus Road, while Wigan Athletic remain at the foot of the table after a goalless draw with Aston Villa.
In The Phuket News’ tippping competition, ‘zedi44’ has made a late surge to take out February’s monthly prize – a B3,000 voucher from Australia Bar and Grill in Kata, where you can watch all the international sport on 50” plasma screen TVs or on the big screen.
In the annual competition, ‘gafferworld’ still holds a commanding lead, and with just 11 rounds remaining, it will take a lot of work for someone to close that gap. The overall winner will receive a return flight to the UK, courtesy of Albatross Lufthansa City Center.
This week sees Liverpool take on Arsenal in a crucial game for the Gunners, while Tottenham host Man Utd in a match that could reshape the top of the competition table.