Chelsea goalkeeper Petr Cech has called on ref Cuneyt Cakir to be strong tonight in Barcelona.

Cech called for a strong performance in the Nou Camp and turned up the heat on Cakir, the 35-year-old Turk who will be in charge of his first Champions League knockout tie.

"The referee can be a big part of the game," said the Chelsea goalkeeper.

"You could see that in the past. There were great games between us and Barcelona but there was controversy, over-shadowing the great games.

"We have an experienced Turkish referee and, if you have experience refereeing Galatasaray and Fenerbahce, a game between Chelsea and Barcelona should be fine. I'm sure he will have the same professional approach as we had in the first game, which was without controversy."