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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Since Guus Hiddink arrived at the helm, Chelsea have improved considerably after a tricky start to the campaign.
Newcastle United are staring down the barrel of relegation to the Championship for the second time in the past eight years.