Footage shows the pair taking to the field for the Red Devils against Swansea in a reserve match last night.
Shaw has been absent since damaging ligaments in April last year.
And Young suffered a serious hamstring problem in Man Utd’s Europa League semi final against Celta Vigo last season.
Both are itching to force their way into Jose Mourinho’s thinking as they work their way back to full fitness.
Video shows the two of them combining during the Premier League 2 game at Old Trafford.
Romelu Lukaku (v West Ham, 2017)
Kenji Gorre opened the scoring for Swansea before Indy Boonen grabbed United’s equaliser with 11 minutes remaining.