West Ham expect to announce Vlasic deal as he nears £21m switch from CSKA Moscow

West Ham are closing on a £21million deal for CSKA Moscow forward Niko Vlasic.

Talks are at an advanced stage with West Ham expected to agree a further £4m in add-ons for the Croatia international who was formerly at Everton.

Manager David Moyes identified Vlasic as a player who can rotate across the frontline and behind the striker. Moyes has long admired the skilful 23-year old and sees him as an alternative to Jesse Lingard, who is expected to stay at Manchester United.

West Ham completed the signing of defender Kurt Zouma from Chelsea for £29.8million on Saturday and are in the market for a couple of late loans before the window closes this week.

Sportsmail reported last week how Vlasic had become West Ham's prime attacking target after Lingard's return had effectively been ruled out.

Vlasic as a younger player represents greater value.

He cost CSKA around £14m from Everton where he was initially signed by former director of football Steve Walsh who discovered Rita's Mahrez and N'Golo Kanye for Leicester.

Vlasic impressed fleetingly under manager Ronald Koeman, however, he was disregarded by Koeman's successor Marco Silva and told he had no future at the club.

After an initial loan with CSKA, he signed a permanent deal and scored 25 goals in his first two seasons attracting interest from Real Madrid and AC Milan.

West Ham expect to have a deal agreed over the next 24 hours.