West Ham are set to complete the loan signing of FC Dallas defender George John and the deal could become permanent.
The 24-year-old will leave the MLS after three seasons, but he will not be involved against Portsmouth on Saturday.
And West Ham boss Sam Allardyce thinks John has all the correct attributes to prove a success with his Championship promotion-chasing club.
Allardyce said: "He's a good defender, of the right stature and the right ability and the right ambition who sees his future in this country.
"He wants to be challenged, wants to improve and his dream is to come and play here. Hopefully we will give him the platform he needs to fulfil those dreams."
Allardyce added: "When it does get clinched we'll need to settle him in for a while."
The Hammers manager also confirmed he will make a decision on Japanese trialist Ryoichi Maeda by Monday.