Manchester United defender Luke Shaw has admitted he's facing an uphill battle to be fit for Saturday's Premier League clash with Arsenal, after suffering a hamstring injury during England's 3-1 win over Scotland last night.
Shaw managed to play 66 minutes at Celtic Park despite feeling a twinge despite picking up a problem with his left hamstring, which will likely have alarm bells ringing at Old Trafford because that's the injury which ruled out United's £27 million man for the first month of the season.
United fans should be heartened by the fact Shaw played through the pain barrier before being replaced by Kieran Gibbs, but until he's assessed by United medical staff his place in the starting XI to face the Gunners on Saturday has to be under serious question.
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In his post-match interview in Glasgow last night Shaw attempted to put a brave face on a niggling injury doubt, although his decision not to come off at half-time as a precaution may have annoyed his club boss Louis van Gaal given United's desperate injury crisis.
Shaw told Sky Sports: "I picked up a few knocks during the game and my left hamstring, which I hurt at the start of the season, I could feel a little bit.
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“We had a discussion at half-time over whether to bring me off then but it was a game I didn’t want to come off in so I played the extra 15 minutes and then Roy decided to sub me off.”
United can ill afford to lose their only fit left-back ahead of a Saturday evening showdown in North London, with their defence already ravaged by injury.
Van Gaal will be without at minimum nine first-team options for the Arsenal game, with the medical facilities at Carrington in need of a vast extension if United's bad luck in keeping key players fit continues.
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Marcos Rojo, Jonny Evans, Phil Jones, Michael Carrick and Daley Blind are just five of the defensive options who will be missing, which places extra importance on getting Shaw back towards something approaching 100% fitness for a match against a direct rival for Champions League qualification.
United fans will now face an anxious wait for news on Shaw's fitness over the next 48 hours, after an international break full of disappointing updates on the injury front.
Carrick, Blind and star goalkeeper David de Gea have all returned with problems which will keep them sidelined beyond the Arsenal game, so Van Gaal will have to make a tough call on Shaw over the next few days. Can he afford to take a gamble on the 19-year-old's long-term fitness?