Newcastle's interest in Brentford striker Yoane Wissa is in danger of blocking Bryan Mbeumo’s move to Manchester United.
The Bees do not want to sell both star forwards in the same summer as they wait for either Newcastle or Man United to meet their valuations.
LIVE BLOG: All the latest transfer news and rumours
Newcastle, who are yet to enter negotiations with Brentford, value Wissa at around £30-35million.
Brentford want a fee of around £50m for the 28-year-old, who scored 19 Premier League goals last season, but would be prepared to accept less than their valuation if payment terms were favourable.
Man United, meanwhile, have seen the asking price for Mbeumo increased to £70m after two bids for the Cameroonian were knocked back by the west London club. The most recent totalled around £62m, including add-ons.
Brentford remain confident in their valuations, with the club holding the option to extend both Mbeumo and Wissa's contracts until 2027.
Tottenham were quoted £50m for Wissa earlier in the window and last week rejected a bid in the region of £20million from Nottingham Forest.
Talks between Man United and Brentford, which began in June, have stalled. The second, and most recent, bid was rejected around three weeks ago, and there is growing frustration from Mbeumo and Brentford about the slow progress of the deal.
Man United's difficulties in tying up a deal for Mbeumo has left the door open for Newcastle and Forest, who retain an interest in Wissa, to sign Brentford's all-time Premier League goalscorer should his valuation be met.
Brentford, who have already lost long-serving head coach Thomas Frank and captain Christian Norgaard this summer, could be persuaded into selling both Mbeumo and Wissa. But any deal of that nature would likely see Man United pay significantly over the odds for Mbeumo.
Mbeumo and Wissa both returned to training with Brentford as expected on Monday.
