Manchester United are monitoring Newcastle United's Lewis Hall and Fulham's Antonee Robinson as potential left-back reinforcements this summer, with Luke Shaw currently the only senior option in that position at Old Trafford. AdvertisementAdvertisement Advertisement🔴 Follow Stretty News on Google as a preferred source and be first with every United update. AdvertisementAdvertisement AdvertisementAs Sky Sports News first reported in March, Hall remains a player United have been tracking for several months. Latest on United's pursuit of Lewis Hall, including Chelsea's competing interestRobinson the Pragmatic AlternativeFulham's Antonee Robinson has emerged as a secondary option. AdvertisementAdvertisement AdvertisementAway from the left-back search, United are also looking at back-up goalkeeper options.