The Croatia defender has declared that "my head is already at Liverpool", comments that did not please the Saints' new manager, Ronald Koeman, but the former Feyenoord boss noted on Friday that the 25-year-old is a key player and that he was expecting him to join the squad for the trip even if he could yet leave.
|5/6||Liverpool are 5/6 with William Hill to finish in the Premier League top four|
"That [public comment about Liverpool] was not a good thing of his side," the Saints manager told reporters on Friday.
"I spoke two times to Dejan. He was very clear about his situation. I said: 'Okay, I am the new manager, I like to keep all the players'.
"I like to keep Dejan in the team because he is an important player in an important position at the team. He has to come back on Sunday."
And that he did, with Southampton posting a photo of him travelling to Belgium on the club's official Twitter account on Sunday.
Southampton have already sold England trio Luke Shaw, Adam Lallana and Rickie Lambert since the season ended but Koeman has brought in winger Dusan Tadic and forward Graziano Pelle from Twente and Feyenoord, respectively.