Emmanuel Adebayor made a nightmare return to the Emirates Stadium on Saturday, his 18th-minute dismissal proving decisive as Arsenal cruised to a 5-2 win over Tottenham Hotspur in the north London derby.
The former Arsenal forward had already fired his side into a 10th-minute lead when he jumped in on Gunners midfielder Santi Cazorla to earn a straight red card.
That transformed the game, with Arsenal establishing a two-goal half-time lead through Per Mertesacker, Lukas Podolski and Olivier Giroud.
Cazorla and Theo Walcott added to the tally after the break, with Gareth Bale claiming one back for the visitors.
The result provided a timely boost for Arsenal manager Arsene Wenger, who has come in for growing criticism following a string of inconsistent performances.
For Tottenham manager Andre Villas-Boas, there was only frustration, as he suffered an embarrassing reverse in his first experience of this local derby. Villas-Boas had admitted in the build-up to the game that Tottenham would attempt to exploit Arsenal's recent frailties at home, when nerves appeared to have affected Wenger's side.
Aguero, Tevez on the double for city
Sergio Aguero and Carlos Tevez each scored twice to add to David Silva's opener as Manchester City recorded a commanding 5-0 victory over Aston Villa on Saturday.
Silva opened the scoring with his first goal of the season and after Andreas Weimann was controversially penalised for handball, Aguero converted from the spot.
Tevez added another penalty and after Aguero thumped in a fourth, Tevez had a tap-in for a fifth as City extended their unbeaten home league run to 36 matches and moved top of the table.
Suarez brace seals points for Liverpool
Luis Suarez scored twice as Liverpool saw off bogey side Wigan 3-0 to inject fresh life into their worst Premier League start in over two decades.
Suarez took his league tally for the season to 10 with a quick fire double early in the second half, with Jose Enrique adding the third to lift Brendan Rodgers' side up from 13th to 11th.
Wigan, who were unbeaten against the Merseysiders in their last five encounters, stayed in 14th.