Sunderland have signed forward Wilson Isidor from Zenit St Petersburg on a season-long loan.
The 23-year-old France youth international has moved from the Russian club in a deal with an option to make the move permanent next summer.
Isidor developed under current Sunderland manager Regis Le Bris, who was a youth coach at Rennes, but the player never appeared in a first-team game for the Ligue 1 side before moving on to Monaco and then Lokomotov Moscow.
He equalled a Russian league record by scoring in each of his first six games for the club but last season moved to rivals Zenit on loan.