Looking ahead to that clash, former Athletic Bilbao player Martinez has admitted that he is expecting a close contest to be played out.
"Everybody is looking forward to the game. I have faced Barcelona a couple of times and often tasted defeat. But now I am at a different club and we will not play for the draw tomorrow. I rate the tie as 50/50," he told reporters.
Both Bayern and Barca are top of their respective domestic leagues.