Manchester United players are baffled by manager Jose Mourinho's tactics, it is being claimed.

The Sun reports stars are confused by Mourinho's chopping and changing of personnel and tactics.

The manager made six changes for Monday's disastrous 3-0 hammering by Tottenham and played three centre-halves, including midfielder Ander Herrera.

Old Trafford insiders say players were uncomfortable with the shake-up — and the muddled situation is leading to tension in the dressing room.

While United's dressing room used to be a happy, vibrant place, it has now gone quiet.

Players are reluctant to express opinions to their under-pressure boss about their plight.