Hannover have confirmed Christian Schulz, Karim Haggui, Sofian Chahed and Markus Miller have signed new deals.
Hannover's Karim Haggui has been hit with a five-match ban for his red card against Borussia Dortmund.
Hannover have completed the signing of Karim Haggui on a two-year contract from Bayer Leverkusen.
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