What is the fine-grained topic of the following text: Bendtner, who was given a chance to prove his fitness but ultimately left out of the 23-man squad by coach Age Hareide due to doubts over his ability to recover from a groin injury, is already back playing for his club side Rosenborg in Norway. Only return the topic.
Bendtner's exclusion from the 23-man squad due to injury concerns