Arsenal and Chelsea will face off in the Premier League on Saturday at the Emirates as they battle for a Champions League place – live on talkSPORT.
The Blues are six points ahead of the Gunners in fourth place with 16 games left to go.
Their rivalry stretches back decades and a number of players have gone on to play for both clubs.
Here at talkSPORT.com we have looked back at those who have worn both shirts during the Premier League era.
Olivier Giroud (Arsenal 2012-2018 and Chelsea 2018-present)
The striker lifted three FA Cups with Arsenal during his five and a half seasons at the Emirates.
He scored 73 Premier League goals in 180 games before a move to Chelsea on transfer deadline day in 2018 and has done okay as a backup striker.
Petr Cech (Chelsea 2004-2015 and Arsenal 2015-present)
The goalkeeper has spent 15 years in England with either Chelsea or Arsenal.
Eleven of those came while playing for the Blues where he made 494 appearances winning four Premier League titles, four FA Cups, three League Cups, the Champions League and Europa League.
Cech announced on Tuesday he will retire at the end of this season.
Cesc Fabregas (Arsenal 2003-2011 and Chelsea 2014-2019)
The Spanish playmaker lit up the Premier League as a teenager with the Gunners and enjoyed eight seasons with the club before moving to Barcelona in 2011.
Fabregas was back in the Premier League three seasons later with Chelsea and in four and a half seasons won two league titles.
He moved from the Blues last week to join up with former teammate Thierry Henry, who is manager at Monaco.
William Gallas (Chelsea 2001-2006 and Arsenal 2006-2010)
Gallas spent five seasons at Stamford Bridge winning two Premier League trophies before switching to north London as part of a deal that saw Ashley Cole go in the other direction.
The central defender spent five seasons at Arsenal before moving to Tottenham.
Ashley Cole (Arsenal 1999-2006 and Chelsea 2006-2014)
Cole came through the Arsenal youth ranks to win the Premier League twice, FA Cup three times and lose out in the Champions League final.
His protracted transfer to Chelsea was completed in 2006 where he went on to win another league title, four FA Cups, the League Cup, Europa League and Champions League.
Nicolas Anelka (Arsenal 1997-1999 and Chelsea 2008-2012)
Arsene Wenger signed Anelka as a 17-year-old from Paris Saint-Germain for £500,000 and he went on to score 23 Premier League goals in 65 games.
Real Madrid came calling and he was signed for £22.3million in 1999 and went on to play for another five clubs before signing for Chelsea in 2008.
He had, arguably, the best spell of his career at Stamford Bridge scoring 59 goals in 125 games and helping his side to the Premier League and two FA Cups.
Emmanuel Petit (Arsenal 1997-2000 and Chelsea 2001-2004)
The France World Cup winner enjoyed a successful spell at Arsenal after signing in 1997, helping them to a league and FA Cup double in his first season.
Petit spent a season at Barcelona before moving to Chelsea in 2001 where he spent the remaining three seasons of his career.
Lassana Diarra (Chelsea 2005-2007 and Arsenal 2007-2008)
Diarra signed for Chelsea as a 20-year-old in 2005 and struggled to get much game time behind Claude Makelele. He made just 31 appearances before being sold to Arsenal on transfer deadline day.
It didn’t get much better at the Emirates as, after only five months with the Gunners, he was sold to Portsmouth.
Yossi Benayoun (Chelsea 2010-2013 and Arsenal 2011/12)
The midfielder was signed for £5.5million by Chelsea from Liverpool in 2010 but was rarely used in his three seasons at the club.
He made 24 appearances in all competitions and was loaned to Arsenal during the middle of this spell.