United turn to Hart as possible back-up

The 'Red Devils' have one of the best goalkeepers in world football in De Gea but that doesn't stop them needing a reasonable substitute.

Romero had done the job brilliantly since moving from Sampdoria in 2015. However, his 38 appearances in three seasons has left him looking for greener pastures, especially after being unexpectedly axed from United's FA Cup semi-final and final XI. 

The Argentine had hoped to showcase his talents in Russia this summer, putting him in the shop window for suitors, but that plan backfired when he picked up a knee injury. 

With the uncertainty over Romero's future, Mourinho is reportedly quietly looking at potential replacements with the Manchester City shotstopper looking like the frontrunner,

Hart's career has famously faltered since falling out of favour with Pep Guardiola but a move to United could be his last revival or big payday. 

Celtic and Scotland keeper Craig Gordon and West Brom's former England international Ben Foster are also reportedly on Mourinho's list.