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Swansea City are set to pay a club record £15m to sign Spanish hot-shot Borja Baston – and then scoop at least £20m by giving the green-light to West Ham to land Andre Ayew.

Atletico Madrid striker Borja is due in South Wales over the next 24 hours to complete a medical and put pen to paper on a deal that will see him link up with Spanish World Cup winning frontman Fernando Llorente in Francesco Guidolin's squad.

But WalesOnline understands Swansea will have to eclipse the £12.5m they paid out for Wilfried Bony in 2013 to seal the deal for the exciting young forward who has attracted interest from all over Europe after his 18-goal breakthrough in La Liga last season.

Guidolin confirmed the move was imminent when he spoke after his side's 1-0 win over French outfit Stade Rennais, Jay Fulton's goal giving Swansea a final pre-season victory before next week's Premier League opener against Burnley.

The Italian also confirmed the story revealed by WalesOnline on Friday that Ayew has played his last game at the Liberty with the club prepared to accept the Hammers' offer once they were confident of bringing in Borja having already snapped up Llorente from Sevilla.

(Image: Huw Evans Picture Agency)

Ayew is thought to have travelled to London with his father, African football legend Adebi Pele, to finalise the move.

But while there had been some indications that the Hammers would pay a basic fee of around £15m, it is now understood that Swansea will get at least £20m for the 26-year-old.

And there could be further add-ons involved in the transfer that could eventually put the deal in touching distance to the record £25m recouped when Bony moved to Manchester City 18 months ago.

Neither deal is likely to be completed until Monday, but it will give Swansea a boost going into the Burnley game after initial frustrations in the transfer window.

However, there is still uncertainty around the future of Ashley Williams as Swansea await Everton's next move. Williams missed the win over the Ligue 1 side – which saw Llorente impress on his debut – as he was rested along with fellow Euro 2016 stars with Guidolin stressing he remains a Swansea City player.