Legia Warsaw sacked coach Besnik Hasi on Monday amid a rough start to the season.
The defending Ekstraklasa champions have won just twice in nine games and were thrashed 6-0 at home by Borussia Dortmund in the Champions League last week.
Hasi, 44, was hired earlier this summer to replace Stanislav Cherchesov, who led the team to the Polish title before taking over the Russia national team.
"Besnik Hasi was removed from his duties as manager of the first team of Legia Warsaw," the club said in a statement.
"On Monday, Aleksandar Vukovic -- assistant manager until now -- is going to temporarily take charge of the first team."