Spurs travelled to Stamford Bridge knowing that only a win would keep alive their hopes of beating Leicester to the Premier League title.
The north London club looked on track to maintain the pressure on the Foxes after going 2-0 up, however Chelsea fought back to claim a 2-2 draw.
Mahrez, who watched the game with team-mates at Jamie Vardy’s house, has admitted he thought it was the funniest moment of the campaign.
Mahrez said: “All the team were at Vardy’s house thinking 'we’re probably not going to be champions tonight'.
“I was like, 'what’s the point of coming?!' and then 2-1, 2-2. It was funny.”