Manchester United goalkeeper Edwin Van der Sar believes it is still a three-horse race in the battle for the Premier League title.
United saw their lead over Chelsea cut to just three points after being held to a 2-2 draw at Middlesbrough on Sunday.
Arsenal boss Arsene Wenger also believes his side is still in the running despite slipping six points off the pace on the back of a recent blip.
But speaking ahead of a decisive league meeting with the Gunners at Old Trafford on Sunday, Van der Sar has warned his team-mates not to write off Arsenal's chances just yet.
"The boss has already said it's going to be very tight - it's a three-horse race," he told MUTV.
"Arsenal visit on Sunday, but Chelsea have a difficult run in and it's not certain that they'll win all their games between now and the end of the season.
"We'll only know the answer as to whether it was a good point won at Boro in five games' time. I think it was an important equaliser.
"A draw is not bad, but losing was out of the question."