Mohamed Zidan promised to maintain his fine goalscoring run against Bayern Munich, when he makes his Borussia Dortmund debut next weekend. The Egyptian scored three times against the Bundesliga champions inside the past couple of years, as he seems confident of beating Michael Rensing on Saturday. "I often score against Bayern, I got two with Mainz and one with Hamburg, and on Saturday I will score one more," he was quoted by Bild. "I am very happy to be back with Jurgen Klopp, my family, relatives and friends have been praying for this move." Dortmund boss Klopp is adamant that his former Mainz employee will shine at Signal Iduna, but does not guarantee the 26-year-old a regular place with the team. "I bet that Zidan will enjoy his time here, I believe in his abilities, but we are talking football here, no player gets a special insurance for a regular place," Klopp said. Zidan failed to secure a regular place at Hamburg last season as he scored only two Bundesliga goals, one of which came against Bayern in a 1-1 draw.