Sidwell denies the players will suffer from fatigue next year.
He said: "I don't think coming back early will be a problem. The boys are quite fit anyway and there's plenty of time when we can have days off during the season.
"I'm sure the lads would rather be playing against some of the best teams in Europe than sat on a beach somewhere. I know I would.
"It's a chance to test yourself and to play in Europe and at any stage of your career that is a highlight.
"I have been fortunate to taste Champions League football whilst I was at Chelsea.
"The Europa League is a good competition and obviously with the achievements the club made here two seasons back, we want to go far in it."