Stefanos Tsitsipas and his team were outfoxed by officials at the Australian Open during his dramatic semi-final defeat to Daniil Medvedev.
The Greek player was handed a coaching violation in the fourth set, after match organisers seemingly sent someone undercover to sit below the box where his coaches and family were situated.
The drama over him receiving guidance between points and games had already erupted earlier on when Medvedev, who had taken the first set 7-6, ranted furiously when 4-5 down in the second.