Barcelona have written to UEFA to complain about ref Wolfgang Stark after their draw at Champions League opponents PSG. Barca claim Stark "did not know the rules of the game" after his performance in the 2-2 draw.

"Barcelona have sent a letter of protest to Uefa regarding mistakes made by the referee in the game against PSG," a Barca spokesman said.

"We just want to express our surprise that professional referees do not know the rules of the game."