West Ham striker Lucas Perez is wanted by Spanish side Real Betis.
The 30-year-old only joined West Ham from Arsenal in August and signed a three year contract.
He has scored four goals in 13 appearances but has largely struggled to impress and was an unused substitute for Saturday's FA Cup win over Birmingham City.
Manuel Pellegrini would allow him to go as he wants to bring another attacking option in.
Newcastle United have asked about taking Faitout Maouassa on loan from Rennes.
The 20-year-old left-back is currently on loan at Nimes and is expected to be called up to the France U21 squad for the European Championships this summer.
Newcastle have also discussed a move for Marseille forward Clinton N'Jie but face competition from Crystal Palace.
The 25-year-old former Tottenham man who is available on loan with option for a permanent deal.