Manchester United dealt double injury scare ahead of Champions League showdown with Atletico Madrid

Man United travel to the Metropolitano Stadium on Tuesday night for their second match of this season league phase, hoping to end a four-game winless run in all competitions.While there was no explanation from Michael Carrick regarding the substitution, footage quickly emerged on social media afterwards of the left-back limping as he made his Old Trafford exit.With such a short turnaround in between fixtures, Man United fans had been fearing the worst about Shaw’s involvement in the Spanish capital.The 31-year-old missed United’s league phase win over Sabah last month through injury and he may sit out matchday two as a result of his absence at Carrington on the eve of the Atletico fixture.Read MoreIf Shaw is unavailable for selection it remains to be seen who replaces him at left-back as Patrick Dorgu and Noussair Mazraoui both remain on the sidelines after sustaining injuries during the international break.Doubts: Luke Shaw and Kobbie MainooGettyMainoo, meanwhile, was also absent from the aforementioned session despite completing the full 90 minutes against Spurs and is now considered a major doubt for the Madrid game.In more positive news for United, Matthijs de Ligt could make his long-awaited return to action after taking part in training along with Harry Maguire, Lisandro Martinez, Leny Yoro and Diogo Dalot.Carrick will provide a full team news update at his news conference on Monday evening.