Despite holding a 13-point lead the City boss admitted the pressure of closing out the race could ultimately prove too much for his players.
It would be the greatest collapse in Premier League history but City could suffer a fourth straight defeat at Tottenham today.
“It can happen," said Guardiola. “Of course it can happen, I assure you.
“In the end, if we're not able to do it and United win the league, all we can say is 'congratulations' to United, reflect on what we've done badly in the last month and move forward.
“But in football it can happen. Football is full of emotions but what we have to try to do is focus and win our games."
Source : http://www.tribalfootball.com/articles/really-man-city-boss-guardiola-fears-man-utd-can-win-the-league-4227541