A decision on possible action against Chelsea players for their behaviour both during and after their Champions League semi-final second leg against Barcelona will be made "in the course of next week", according to Uefa.

Didier Drogba and Michael Ballack face possible sanction for verbally attacking referee Tom Henning Ovrebo over the official's decision to turn down several penalty appeals from the home side at Stamford Bridge.

Chelsea manager Guus Hiddink, skipper John Terry and full-back Jose Bosingwa were also highly critical of the referee's performance.

"With regard to the Uefa Champions League semi-final second leg between Chelsea FC and FC Barcelona in London on Wednesday, Uefa has received both the referee's and delegate's report," read a Uefa statement issued this morning.

"Uefa is currently examining those reports, as well as gathering additional evidence. It will decide which action to take in the course of next week.”

While the sanctions are expected to focus on Drogba and Ballack, Chelsea could also face a charge of failing to control it's players.

While Drogba admitted last night he “overreacted” after Andres Iniesta's injury time goal sent Barcelona into the final and apologised for the language he used on live television, but he stopped short of apologising to the Ovrebo.

The Ivorian was later defended by captain Terry, who said he had every right to voice his disgust and questioned the appointment of an 'inexperienced' official to such a high profile game.

Bosingwa branded Ovrebo a "thief" before retracting the comments in the Portuguese media, while Hiddink also backed Drogba and said it was the worst refereeing performance he could recall.