Newcastle United midfielder Jack Colback is not expected to play again for the club following a bust-up with manager Rafael Benitez, according to the Daily Mail.

What's happened?

The 27-year-old, who made the controversial move to St James' Park from arch rivals Sunderland in 2014, has seemingly got on the wrong side of Benitez.

The Daily Mail reports that Colback has been shunned from the first team and ordered to train alone.

The publication states that the midfielder was already training on his own, but was called up after one of the players suffered a knock.

It is believed that Colback refused, which incensed Benitez, who will reportedly leave the player out of his squad for today's Premier League opener against Tottenham Hotspur.

The Daily Mail adds that the midfielder has been offered to other clubs, but no deals are close to happening due to the Englishman's £40,000-a-week wage demands.

Can his Newcastle future be saved?

Benitez can be a stubborn character, so if Colback has fallen out with the Spaniard, then it does not bode well for him.

The 57-year-old coach is not afraid to make his frustrations known, and it appears that he tends to want things to go his own way.

During his time at Liverpool, Benitez publicly criticised the club's former American co-owners Tom Hicks and George Gillett for their lack of transfer spending.

This summer, the ex-Real Madrid boss has admitted that he is unhappy with Newcastle's activity in the window.

Given how Benitez conducts himself, it is difficult to envisage Colback coming back into the setup, and it may even be better if he doesn't.

If the Magpies are to retain their Premier League status this season, then they need to have a focused and united camp.

They cannot afford any distractions or negative energy within the dressing room.

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