You're partially right, but sometimes unexpected things can happen.
For example, opposite Jan Hadrava has valid contract with Jastrzebski (they are not some kind of random team, they will play in male CL final). However, recently he got a great offer from Galatasaray and turkish team is able to buy-out his current contract. And now Jastrzebski needs to look for new opposite.
You are right.
But Handrava is not the main player of this team.(I would say he barely starts half of the games)