Summary:
West Ham's bid to sign a winger for the vacant club cap is a major hurdle for the club, the BBC understands.

Full article:
Dnipro have rejected West Ham's bid for Yevhen Konoplyanka. The Ukraine winger has a £12million buy-out clause so the rebuff was expected. Manager Sam Allardyce is keen to bring in a wide player with Ashley Young and Wilfried Zaha at Manchester United among names he is considering. VIDEO Scroll down to watch PITCH FIGHT Ravel Morrison scraps with Wilfried Zaha . Wanted: Dnipro have rejected West Ham's move for Yevhen Konoplyanka this week . Kop target: Ukraine international Konoplyanka (centre) is wanted by West Ham . Wide players: West Ham manager Sam Allardyce is keen on Man United's Ashley Young and Wilfried Zaha . Allardyce has an offer on the table for Boca Juniors left-back Emanuel Insua. But Big Sam could revert to back-up option Timothee Kolodziejcak at Nice if that falls through. West Ham's season starts with a London derby against Tottenham Hotspur at home on August 16. Target: West Ham have made a move to sign Emanuel Insua (right) on loan from Boca Juniors .