United reportedly scout Swansea's Alfie Mawson
The centre-back has recently called his first ever England national team call-up.
As per the Sun, United sent a scout to observe Swansea clash against West Bromwich, in order to gather information on Mawson. It's understood, Jose Mourinho received positive reviews on the defender's level.
While United's Portuguese boss is still searching for a centre-back to link up with Eric Bailly, Tottenham Hotspur are also believed to be interested in the £40 million Englishman.