Old adversaries Arsene Wenger and Jose Mourinho clash on Sunday as Arsenal host Manchester United in a match crucial to both sides' Champions League ambitions. Here, Press Association Sport looks at some of the past meetings between the rival managers.
December 12, 2004: Premier League, Arsenal 2 Chelsea 2
A thrilling clash at Highbury ended all square after Mourinho's Chelsea twice came from behind. Thierry Henry scored both for the Gunners but John Terry and Eidur Gudjohnsen replied. Henry also spurned a good late chance to win it - and Wenger had to wait another 11 years to get the better of Mourinho.
February 24, 2007: League Cup final, Chelsea 2 Arsenal 1
Didier Drogba struck twice as Chelsea came from behind to win an ill-tempered affair at the Millennium Stadium. Theo Walcott opened the scoring but Drogba benefited from a controversial offside decision to level and then headed an 84th-minute winner. The game ended with ugly scenes as John Obi Mikel, Kolo Toure and Emmanuel Adebayor were sent off following a brawl.
March 22, 2014: Premier League, Chelsea 6 Arsenal 0
Mourinho ruined Wenger's 1,000th match in charge of the Gunners as his side delivered a devastating blow to their title rivals. Samuel Eto'o and Andre Schurrle scored within seven minutes and there was no way back for Arsenal after Alex Oxlade-Chamberlain's handball was punished from the spot by Eden Hazard. To compound matters, Kieran Gibbs was sent off for the Oxlade-Chamberlain offence in a case of mistaken identity. Oscar (two) and Mohamed Salah completed the rout.
October 5, 2014: Premier League, Chelsea 2 Arsenal 0
A Hazard penalty and a late strike from Diego Costa helped Mourinho to another win over Wenger, but the headlines from a tight game were made on the touchlines. Wenger was angered by a tackle from Gary Cahill on Alexis Sanchez and marched towards Mourinho's technical area to protest, pushing the Portuguese as they met. Wenger later apologised but claimed he was provoked.
August 2, 2015: Community Shield, Arsenal 1 Chelsea 0
Wenger finally got the better of Mourinho - at the 14th attempt - as a superb Oxlade-Chamberlain strike won the Community Shield at Wembley. Once again, however, the bad blood between the pair commanded a lot of the attention after Wenger twice avoided shaking hands with Mourinho post-match.