Czech Republic midfielder Tomas Rosicky has an “imbalance of his muscle structure,” according to team doctor, Pavel Kolar, and the assessment is a jolt for Arsenal as Arsene Wenger could be left frustrated by the frequent unavailability of the talented winger.

Rosicky’s career with the north London club following his move in May 2006 from Borussia Dortmund, has been a sad tale of injury problems. He was limited to just 22 appearances last season due to various muscular injuries and has currently been out with groin and thigh problems.

"Tomas has an imbalance of his muscle structure," Kolar told MF Dnes.

"In my opinion, this plays a big role in his injuries. Some of his muscles work more and are more developed whereas others are not.

"The problem is in the coordination of muscles which Tomas uses. Muscles on the rear side of his thigh are enormously strained, it is a matter from his childhood."