Manchester United legend Sir Bobby Charlton insists the current team are 'capable' of pipping Chelsea to win the Premiership title this season.
The United director makes Jose Mourinho's side firm favourites for the title, and expects their seven-point lead to prove insurmountable, but he is confident the Red Devils would be ready to make the most of any slip-up if Chelsea were to stumble.
The teams must also meet at Stamford Bridge on April 29, when there may still be uncertainty over the destination of the trophy Chelsea won last year.
'We have a slight, slight chance of catching them but it all depends on Chelsea,' Charlton told the BBC.
'All we can do is do the best we can. I'm not going to say we're going to do it, I'm going to say we're capable of doing it.
'Manchester United will never be forgotten if they're able to claw it back, from being 18 points behind it would be sensational.'
And Charlton, who made 752 appearances as a player for United, insists manager Sir Alex Ferguson would be due much of the credit if Chelsea's lead can be wiped out.
United were at one stage 18 points adrift of the defending champions, but Chelsea have struggled to maintain the form they showed earlier this season and gradually their lead has been eaten away.
'Alex Ferguson's record at United is unbelievable,' said Charlton.
'If he was to win the title, he would have to be acclaimed as the greatest manager of all time.'
The 68-year-old added: 'If it happens, then to do what he has done and to come back like that, when so many had written him off, would be fantastic.'