Manchester United and Tottenham Hotspur remain far apart in their valuation of a deal for Toby Alderweireld, according to Sky sources.
Sky Sports News understands United are interested in the Belgium international, with Spurs pricing the defender in excess of £50m.
The 29-year-old has one year left on his current contract, with an option for a one-year extension that includes a £25m release clause for next summer, but talks over a new deal have continued to stall.
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At this stage, sources understand United forward Anthony Martial, who has told Jose Mourinho he wants to leave, is unlikely to end up at Spurs despite the club's long-standing interest in him, meaning United would need to meet the full asking price for Alderweireld.
However, United do not share Spurs' valuation of a player with a year left on his current contract.
Any potential move for Alderweireld is expected to go to the final days of the window, which closes on August 9 for Premier League clubs.
Earlier this month, Alderweireld said his prolonged spell out of Tottenham's first-team last season was "unjustified", while he admitted he was still unsure about his future.
Another potential outcome is that Alderweireld and Tottenham could yet agree terms on a new contract but that is looking increasingly unlikely, according to Sky sources.
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Jose Mourinho is looking to bolster his defensive options ahead of the new season. On Wednesday, Sky Sports News reported United have approached Leicester regarding England centre-back Harry Maguire.
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