West Ham have completed the signing of Barcelona midfielder Alex Song on a season-long loan deal.
West Brom have completed the signing of Argentina winger Sebastian Blanco from Metalist Kharkiv for an undisclosed fee.
The 21-year-old, the cousin of double World Championship gold medal-winning athlete Ladji Doucoure, has become a regular in coach Philippe Montanier's side since the turn of the year and has made 17 Ligue 1 appearances this season.
The Rouge et Noir have a Coupe de France final against Guingamp to look forward to on Saturday and Doucoure said: "This week has started well, I hope it will also finish well. We hope to play a great match."