By London correspondent Tony Hughes

West Ham are set to finalise the signings of Andre Ayew and Arthur Masuaku by Monday night, Football Insider sources understand.

The Hammers are in advanced talks to complete deals for the Swansea forward and the Olympiakos left-back.

A well-placed West Ham recruitment source told Football Insider that the club are confident of sealing the £20million signing of Ayew and the £1million capture of Masuaku in the next 24 hours.

The London club secured breakthroughs in both deals over the weekend following extensive negotiations.

Manager Slaven Bilic admitted in the aftermath of Sunday’s 3-2 pre-season friendly defeat to Juventus that West Ham were close to two new signings although he did not disclose the identity of the players.

“We are looking at two new players and we are close, I thought it would be yesterday and they would be involved today,” Bilic said, as quoted by ESPN FC. “These players have done pre-season at their clubs, but the paperwork was not done.”

Ayew, 26, underwent a medical with the Hammers this weekend but Swansea have been reluctant to process the deal while they step up their own bid for another striker.

The capture of the Ghana international will be regarded as a landmark deal for West Ham as it will smash their transfer record, which stands as the £15.5million signing of Andy Carroll from Liverpool in 2013.

The Swansea hitman scored 12 goals in his debut season in the Premier League and has attracted the attentions of the Hammers during their extensive search for a top class striker.

Ayew, who plays predominantly on the left wing, was thought to be interested in West Ham last summer before eventually joining Swansea on a free transfer.

Masuaku, who is a former France Under-19 international, has two years remaining on his contract with the Greek club.

The 22-year-old has been a mainstay of the Olympiakos team since his 2014 transfer from Valenciennes.

West Ham manager Slaven Bilic has admitted it is a “priority” for the team to secure a left-back signing in time for the opening day of the Premier League season in just over one weeks time against Chelsea.

This comes after Aaron Cresswell was ruled out for up to four months with a knee injury.

In other West Ham transfer news, their negotiations over a new defender have collapsed.