Chelsea boss Jose Mourinho does not believe his side are capable of challenging for the Premiership and the Champions League this season.
“Winning two trophies in a season has happened to me twice in the last two years, but I don’t think there will be the third success,” said Mourinho.
“In England it is different (in the league), because everyone can take points from the big teams.”
Chelsea face CSKA Moscow on Tuesday, needing just one more point to qualify for the knock-out stages of the Champions League.
But despite their impressive form in Europe, which has been matched in domestic football, Mourinho does not expect his side to maintain a challenge on two fronts.
“I think it is harder in England,” said Mourinho, who combined success in Europe with domestic triumphs while at Porto.
“In the two seasons in Porto when we won the championship twice, the Uefa Cup and the Champions League, it was quite easy to win the league.
“In the early stages of the league in Portugal, we got big distances in front.
“When you lead the championship by a long way, you can rotate a lot of players and protect them and then you can then use them at the highest level in the Champions League.
“But the signals in the Premiership at the moment are that there will be a big fight for the title.”