Chelsea boss Jose Mourinho refused to dismiss Manchester United’s title chances despite the champions falling 12 points behind Arsenal.
While Chelsea won 4-3 at Sunderland on a busy night of Premier League action, United lost 1-0 at home to David Moyes’s former club Everton.
“It’s difficult but with Manchester United everything is possible,” said Mourinho, whose side remains second.
United boss Moyes, however, believes they “have a long way to go.”
United have taken only two points from their last three games and are ninth in the table on 22 points from 14 games.
Leaders Arsenal, who have a four-point advantage over second-placed Chelsea, have 34 points from the same number of matches.