Liverpool star Dejan Lovren surprised the Dinamo Zagreb players at their hotel on Tuesday, according to Croatian outlet Sportske.
The defender was photographed with manger Nenad Bjelica, ahead of their their Champions League match against Manchester City.
Lovren spent four years Dinamo Zagreb, as he started out his career in professional football.
Pep Guardiola’s side are hot favourites for the Group C clash at the Etihad Stadium on Tuesday night (8pm).
But, Dinamo stunned Italian high flyers Atalanta two weeks ago, when they beat them 4-0.
Winger Mislav Orsic scored a hat-trick as the Croatians went to the top of the group, knowing that their toughest tie was up next.
Bjelica’s side are currently second in the Croatian first division, having won six of their nine league matches.
They’re a point behind Hajduk Split, who beat Dinamo 1-0 in August.
But, Dinamo go into the tie against City in decent form, having won their last two matches without conceding a goal.
They beat NK Lokomotiva 4-0 on Friday night, after winning 7-0 against fourth division side Karlovac in the Croatian Cup a week ago.
City, meanwhile, have scored 17 goals in their past four matches, having conceded just once.
Guardiola’s side beat Shakhtar Donetsk 3-0 in their opening Champions League match of the season last month.
Riyad Mahrez starred for the Citizens as he opened the scoring midway through the first half.
Ilkay Gundogan scored the second before the break, and then Gabriel Jesus rounded off the victory.
But, City know they should’ve won by more than three goals, having had a number of opportunities to score.
A win for City tonight will see them top Group C, before hosting Atalanta next time out.