Rennes defender Nayef Aguerd is to have a medical this week ahead of his £25million move to West Ham, who remain keen on Southampton's James Ward-Prowse.
The 26-year-old centre-back has been a long-time target of manager David Moyes and West Ham increased their initial offer to £25m to get the deal for the Morocco international over the line.
Aguerd's arrival could signal the departure of Issa Diop who has a year left on contract and struggled for form at times last season.
Nayef Aguerd (left) is to have a medical this week ahead of his £25m move to West Ham
Kurt Zouma also had a couple of spells on the sidelines last season while Craig Dawson struggled with fitness.