Born 20 November 1996 in Geneva, Zakaria began his football career with Servette. With his local club, he made his professional debut and also scored his first goal, before moving to Young Boys. After two seasons with the club from Berne he left Switzerland for Germany. 
For four and a half seasons, Denis put his qualities at the service of Borussia Mönchengladbach, making a total of 125 appearances - the second youngest player to reach that benchmark in the German top flight - and scoring 11 goals. Stats that highlight how he became central to the Mönchengladbach midfield.
Evidence of his consistency and reliability, is that Zakaria is one of the three Borussia Mönchengladbach players to have scored in each of the last 5 seasons in the league and one of the three Bundesliga midfielders this campaign to have completed at least 90% of their passes. 
Such performances on the domestic front have also been recognised at international level, with 40 caps and three goals with Switzerland.
Explosive, dynamic and gifted with a highly-tuned tactical awareness, Denis is now preparing for the most stimulating and special of adventures, in the shirt of the Bianconeri.