Borussia Dortmund are still waiting to know how serious Mohamed Zidan's injury is after the Egyptian striker was substituted during the victory over Werder Bremen. Zidan created Dortmund's second goal in the 2-1 triumph before leaving the pitch in the 68th minute. "Zidan's injury hasn't been diagnosed yet," Dortmund manager Jurgen Klopp told Ruh Rnachrichten following Saturday's game. Zidan's assist was the sixth in nine games. He also scored six times since returning from Ghana, where he helped Egypt win their third straight African title. Dortmund are fighting for a place in the Champions League next season, as they are placed fourth on 52 points, one point behind third-placed Bayer Leverkusen. With five games to go, Dortmund will face relatively moderate opponents in comparison to Leverkusen, who still haven't played with leaders Bayern Munich.