Manchester City goalkeeper Joe Hart is being linked with a shock move to Manchester United.

The Sun says Hart is in the frame to become Manchester United's new back-up keeper.

United chief Jose Mourinho seems resigned to losing No 2 Sergio Romero.

And Manchester City outcast Hart fits the bill as cover for Old Trafford No 1 David de Gea.

Hart, 31, fell out of favour under City manager Pep Guardiola. And two loans spells at Torino and West Ham did nothing to quell fears that Hart's best days are behind him.

His poor form for the Hammers last season saw him left out of England's World Cup squad.

And he is seeking a new challenge to try to revive his fortunes.