Chelsea manager Jose Mourinho has appealed to fans to be on their best behaviour to ensure his side's Champions League quarter-final showdown against Valencia passes off without any trouble.

"I hope the fans get on, that they have a beer or two, not too many though," the Portuguese told a news conference on Monday. "It is a chance for people of different cultures and languages to get together.

"I hope Chelsea can be proud of their fans and that Valencia too can contribute to a positive atmosphere just like there was at Stamford Bridge where there were no problems whatsoever."

Recent European games involving English clubs Manchester United and Tottenham Hotspur have been affected by crowd problems, with controversy over the reaction of local police who have been accused of a heavy-handed response.

Chelsea and Valencia drew 1-1 in last week's first leg.