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In page Michael Ballack:

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On 20 February 2011, Ballack made his return from injury, coming on as a substitute for Simon Rolfes against VfB Stuttgart; Leverkusen won the match 4–2. Ballack scored his second Europa League goal against Metalist Kharkiv, a match Leverkusen won 2–0 and the two-legged tie 6–0 on aggregate to progress to the round of 16.[2] Ballack played the full 90 minutes against Schalke 04, assisting Eren Derdiyok's goal in an eventual 2–0 victory.[3]