The 25-year-old right-back Jordan Lotomba is moving from Nice to Feyenoord Rotterdam.
Feyenoord are replacing defender Lutsharel Geertruida, who has moved to RB Leipzig in the Bundesliga. Lotomba was available because Nice are playing with three central defenders under new coach Franck Haise and Lotomba's contract would have expired at the end of the season anyway.
Jordan Lotomba played for Lausanne-Sport and Young Boys in Switzerland. He has made eight international appearances to date and has made 143 Ligue 1 appearances for Nice in the last four years.