Bayer Leverkusen are understood to want Brandon Williams on a permanent deal, while Manchester United look at a loan; Williams can play left or right full-back and made 36 appearances for United last season; Leverkusen need injury cover for Santiago Arias

The Bundesliga side are looking for a replacement for Santiago Arias, who joined the club on loan from Atletico Madrid in September but then suffered a broken leg and ankle ligament damage while on international duty with Colombia.

Arias had only been able to make one league appearance for his new club before the injury.