Chelsea manager Jose Mourinho is adamant his side will regain their Premiership crown, despite losing to Manchester United 1-0 at Old Trafford.
"United were not the best team on the pitch," he said after Chelsea's 40-match league unbeaten run came to an end on Sunday.
"I hope they can realise why Chelsea are champions, top of the league and I believe will be champions again.
"I think the difference between us was only luck to be fair."
Following the midweek defeat to Real Betis in the Champions League, Sunday's game marked the first time Chelsea have lost consecutive games under Mourinho.
"I finished the game in Seville with a very bad taste but I am proud of my players and not afraid of the future," added Mourinho.
"I don't think we deserved to lose today but I give them credit for the way they defended.
"We are disappointed but it's one thing to lose after a very bad performance and another to lose after a good game of football."
Last season United beat then-leaders Arsenal, a defeat that precipitated a slump in form for Arsene Wenger's side which cost them the title.
But Mourinho insisted there were no parallels between United's two victories.
"When Arsenal lost here the difference was small and they were very close to the other opponents but at the moment we still have a comfortable distance between us and the others," said Mourinho.