Manchester United could face an injury crisis in defence following reports that Chris Smalling has suffered a knock in training.
The England international has hurt his thigh and must undergo a fitness test ahead of this Saturday's Premier League clash with West Ham United, the Daily Mail reports.
United boss Louis van Gaal is already without the services of injured duo Phil Jones and Jonny Evans, while their fellow defender Tyler Blackett will be missing through suspension.
Smalling was in line to partner Marcos Rojo in central defence against the Hammers, but Van Gaal faces a nervous wait while the injury is assessed.
