Former Premier League referee Mark Clattenberg has named five players who he found annoying, which includes a couple high-profile names.
Clattenburg called time on his career in the English top flight in 2017 after 13 years and is now working in Saudi Arabia as Head of Refereeing.
The 45-year-old has officiated a number of high-profile games in England as well as the UEFA Champions League and he has named John Obi Mikel as one of five players who annoyed him in an interview with the Daily Mail.
"Because of the incident during a Chelsea vs Manchester United match in 2012, when he accused me of making a racist comment, which was not right and I was later cleared by the FA," he told the Daily Mail.
Clattenburg was not a fan of Manchester United legend Roy Keane and his 'hard man' approach.
"He always came across as stone-cold and wanted to be the hard man. That causes problems for referees because the ego kicks in and it becomes a fight, like it did between him and Patrick Vieira."
The former Premier League referee also named Pepe, former Arsenal goalkeeper Jens Lehmann and Craig Bellamy, who he described as a nightmare.
"A nightmare to referee and most of us felt the same. He would snarl at you and throw his arms around, constantly challenging you. His language was awful, just plain rude."