Arsene Wenger says it is too early to judge why English clubs have found it difficult in Europe this season.
Chelsea were knocked out of the Champions League by Paris Saint-Germain on Wednesday night, while Manchester City and Arsenal must overcome first-leg defeats if they are to progress.
Liverpool and Tottenham were recently eliminated from the Europa League too but Wenger feels that introducing a winter break would not necessarily guarantee success.
"What’s for sure is that the Premier League is a very demanding championship physically. That can maybe have an impact"
“We have spoken about this for a long, long time,” the boss said. “It would be a bit superficial to just go to that cause [for English sides struggling in Europe].
“First of all I believe that PSG and Barcelona are great teams. No matter if we had a winter break, you can be in trouble against these kinds of teams.
“It’s too early to draw conclusions about the Champions League efficiency of the Premier League.
“What’s for sure is that the Premier League is a very demanding championship physically. That can maybe have an impact.
“On the other hand you could also say that it gets us used to playing at the top level and it can be an advantage. It’s too early for me to come to any conclusion.”