West Ham £7million bid rejected for Andrew Robertson
A superb debut season in the first team last term saw the Manchester United youth product make 16 Premier League appearances under Louis van Gaal.
However, with Luke Shaw returning to full fitness after 10 months out, opportunities will be limited for the 19-year-old. The club will be keen to see how the full-back progresses with Sky Sports News reporting that manager Jose Mourinho is open to allowing him to be loaned out for a season.
The deal would make sense with Borthwick-Jackson the quick fix to resolve the issue at left-back, and with first choice Aaron Cresswell out for up to four months, the United man will certainly provide competition once he's back
Despite being relegated with Norwich City last season, the Irishman was a standout performer for Alex Neil's men whether that be at left back or left midfield.
He continued his fine form into the Euros where he scored the pivotal goal to secure the Republic of Ireland's progress into the last 16, his performances in France have certainly proved to many that he can perform in the Premier League.
Despite being shifted from defence to midfield, he's been able to adjust, something which could please Slaven Bilic when Cresswell does come back into the fold.
Arguably the most unlikely, but the free agent could be a perfect replacement for Aaron Cresswell until he paves his way back into the team.
The former Liverpool man doesn't exactly fit the player criteria under Bilic who are certainly looking to build a team for the future but the Spaniard could provide experienced cover until Cresswell is back to full fitness.
Despite only featuring three times last campaign some Premier League clubs such as Crystal Palace and West Brom are looking at the left back so if West Ham want to solve their defensive issues, they must act quickly.
West Ham manager Slaven Bilic