The Manchester City manager has grown weary of the Italian forward and his patience appeared to be at an end at the training session.
In widely circulated pictures, the two are seen remonstrating before being separated by staff.
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The reputation of the Premier League means it is the most popular and one of the most watched leagues in the world.
Five English clubs will compete in the last sixteen of the Champions League for the first time ever as Liverpool, Manchester United, Manchester City, Chelsea and Tottenham face some difficult away matches.