When were the other closest three-way title races?published at 10:57
There have only been a handful of three-way Premier League title races where the teams have been separated by just two points towards the end of a 38-game season.
2013-14: By as late as 6 May 2014 only two points separated Liverpool, Manchester City and Chelsea, but City won their game in hand to leapfrog a stumbling Liverpool - characterised by Steven Gerrard's infamous slip and Crystal Palace's comeback - and snatch the title.
2001-02: On 23 April 2002, Arsenal led Liverpool by a point, with Manchester United a further point back. But the Gunners had a game in hand and were part-way through a run of 11 consecutive wins and sealed the title by beating United at Old Trafford.
1995-96: In mid-March, with eight games left Manchester United were level on 61 points with Newcastle United and Liverpool were on 59 points in third. Despite having played two games more, Sir Alex Ferguson's side saw off the challenge of Kevin Keegan's Magpies.
What if they finish level on points?
Going into Sunday's game between Arsenal and Manchester City, the chance that at least two of the three title contenders finish level on points at the top of the Premier League is 9.4%, according to simulations run by Gracenote. The chance that all three finish level on points is just 0.5%.
Should there be a tie, the league is decided on goal difference, then goals scored, then most points in the head-to-head matches, then most away goals in the head-to-head record.
Whatever happens, there are certain to be plenty of twists and turns between now and the final day of the campaign on 19 May.