Porto will refuse to sell Alex Telles if Manchester United don't meet their asking price this week - according to reports.

United accepted the need to sign a new left-back following their defeat to Crystal Palace in their Premier League opener and have accelerated their transfer plans ahead of the October 5 deadline.

MEN Sport understand Telles has been monitored by the club and there could be some movement ahead of the deadline, with Porto unlikely to demand his full £36million release clause given there is less than a year remaining on his current contract.

Portuguese outlet O Jogo report Porto are demanding €20m for the defender but United are only willing to offer €15m. The same report adds that the Liga NOS side won't wait much longer for an acceptable offer and could refuse to sell Telles if they do not have enough time to sign a replacement.

Alex Telles to Man Utd transfer latest

The Portuguese transfer window closes on October 6 and reports suggest United could miss out if they plan to wait until the last minute before upping their offer for the 27-year-old.

Elsewhere, reports claim Brighton want to sign Daniel James on loan this summer.

James joined United from Swansea last summer but has struggled to break into the starting XI following the emergence of Mason Greenwood.

Reports claim Leeds are interested in the Wales international with Brighton also joining the race for his signature, as per The Athletic.

Graham Potter worked with James during his time with the Swans and is believed to be keen on a reunion.

MEN Sport understand United have no interest in allowing James to leave.