Answer
Borussia Mönchengladbach was the first German club Voronin played for. He joined the club in 2000 and spent three seasons there, making 77 appearances and scoring 16 goals. During his time at Mönchengladbach, Voronin helped the club win the 2003 DFB-Pokal, the German Cup. He left the club in 2003 to join Bayer Leverkusen.