Werder Bremen completed the signing of defender Fallou Diagne from Rennes on Monday, shortly after giving coach Viktor Skripnik a new contract.
Diagne, 26, previously played in the Bundesliga with Freiburg for two seasons before moving the France in 2014.
He earned his first cap for Senegal in May.
"Fallou is a very well-trained player, who has recently taken the next step in his development," said sporting director Frank Baumann.
"At 26 years old, he's already a seasoned central...