Bayern Munich Ottmar Hitzfeld is not worried by the absence of key man Franck Ribery when the Bundesliga leaders take on Werder Bremen in a crunch top of the table clash on Sunday. The French winger sustained a thigh injury against Hansa Rostock last weekend, but Hitzfeld is adamant that his side have alternative options. "Of course it's a loss. It's impossible to provide a like-for-like replacement for a world-class player like Franck, but we're strong enough to beat Bremen even without Franck Ribery," he told Bayern's official site. "Franck is world class in one-on-ones, or one against two. But we do have enough creative players who are comfortable on the ball and have the ability to play decisive passes. I have no worries. "I don't want to talk about individual players at this stage, I haven't decided on my starting eleven yet, there are a number of options." Bremen have a chance to level on points with the Bavarians if they snatched a victory at Allianz Arena.