West Ham have agreed a £13m deal to sign Czech Republic midfielder Tomas Soucek from Slavia Prague.
Boss David Moyes confirmed the 24 year old is undergoing a medical at the Hammers' Rush Green training ground.
"He fits the profile of the player I want," Moyes said of Soucek, who has 25 caps for his country.
"We are in a difficult period where we need experienced players," added Moyes, who is in his second spell at the club.
"At the moment he [Soucek] ticks a lot of boxes. We need to give him an opportunity and time to settle in."