Gallas played for both Tottenham Hotspur and Chelsea.
Continuing on our exploration through the weird world of football transfers during this summer transfer window, having recently looked at 7 notable double-signings, today we explore players who have been used as makeweights in transfers in the past.
Thierry Henry appeared to snub Aston Villa for Monaco.
William Gallas played for all three of Arsenal, Tottenham or Chelsea.
Players to have represented both Tottenham Hotspur and Arsenal, and Sunderland and Newcastle United are included on this list.
Arsenal manager Arsene Wenger is under heavy pressure with his side 16 points adrift of league leaders Chelsea.
The former Chelsea, Tottenham Hotspur and Arsenal defender has given his thoughts on the Premier League title race.
William Gallas spent time at Chelsea, Arsenal and Tottenham Hotspur during his 12-year stint in the Premier League.
Hugo Lloris is Tottenham Hotspur's and France's number one goalkeeper.
The 20-year-old Tottenham Hotspur midfielder says the former defender was one of his biggest inspirations.
The Gunners midfield ace has had a superb month for Unai Emery and co.
Arsenal have signed Dani Ceballos on loan from Real Madrid, and Unai Emery may well be tempted to make the move permanent.
Everything you must know about how to get Super Horns in Mario Kart Tour to complete the 'land five hits' challenge.
The striker was allowed to leave Rangers by the Ibrox boss Steven Gerrard in August.
Newcastle United sold Lewis Gibson to Everton back in 2017, but Steve Bruce now wants to bring him back to St. James' Park.
James Milner's stoppage-time penalty helped Liverpool secure all three points against Leicester City over the weekend in what was a drama-filled encounter.
Tottenham Hotspur defender Toby Alderweireld has faced criticism over his performances so far this season.
Rangers are giving Cameron Gascoigne a chance to earn a deal at Ibrox.
The former Liverpool manager wouldn't hesitate to join their rivals Everton, says Richard Keys.
Tom Bradshaw will reportedly face no retrospective action for what Leeds United fans claim was simulation at The Den on Saturday.