On what grounds ?
He has done nothing wrong.
He will want to play at least a little and he will want to leave
If he broke any rules be refused to play etc he would at least get wages docked and could end up getting sued so if he did stay despite both sides wanting him to do he would have to at least behave and play when required etc. However I believe we would also have to play him a certain number of times to avoid him suing us