Frank de Boer is one of the names currently in the frame for the West Ham job

West Ham are discussing their vacant manager's job with four men - Frank de Boer, Unai Emery, Slaven Bilic and Marcelo Bielsa - according to Sky sources.

The Hammers are keen to appoint a new boss within the next 10 days after former manager Sam Allardyce's contract was not renewed and he left the club last week.

Ajax boss De Boer, whose side finished runners-up to PSV Eindhoven in the Eredivisie this season, was in contention for the Tottenham job before they hired Mauricio Pochettino last summer and has retained a desire to manage in England.

Besiktas boss Bilic, meanwhile, has an affinity with West Ham having played over 50 times for the club and is also believed to be keen to manage in the Premier League.

Unai Emery: Sevilla head coach

Unai Emery is the Sevilla head coach who has clinched two successive Europa League trophies and Argentinian Bielsa is the current boss at Marseille.

Last week, Hammers co-owner David Sullivan promised supporters there would be imminent signings and a 'big-name' manager.

Slaven Bilic: Has left Besiktas

He said: "I am dedicating every waking minute to recruiting the best available manager to drive our club forwards.

"It is a constantly changing landscape but we are being absolutely thorough in our search, by speaking to representatives of a number of managers and doing our own due diligence on each one.

"Given that, I am not expecting us to make an appointment for at least a week as we must do everything we can to get this appointment right."