West Ham United boss David Moyes is delighted at this side securing Nikola Vlasic from CSKA Moscow.
The 23-year-old Croatian international is a creative attacker who can play across the front line.
Despite being linked with Manchester United's Jesse Lingard for much of the window, the Hammers opted for the younger Vlasic for a similar fee.
Moyes told the club's website: "I have been watching him improve over recent seasons – he has got a good goals and assists record during that time.
"He is also a Croatia international with experience and still being only 23, I feel there is more to come from him.
"I was really impressed with how determined Nikola was to become a West Ham player.
"It's that hunger and ambition that fits with what we are trying to build here at the Club."
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