Bad behavior: Sport's top five troublemakers

    The mugshot of Australian tennis star Bernard Tomic, arrested in Miami on July 15. Sport may be lacking some genuine bad boys these days but Tomic recent brush with the law is keeping athletes in the headlines.

    (CNN)From hotheaded outbursts to excessive partying and illicit steroid use, the world of professional sports has never been short of athletes courting controversy. Here are five sports stars making headlines for their antics on and off the courts:

    Bernard Tomic
    Bernard Tomic, pictured at Wimbledon in July 2015, has racked up on- and off-the-court headlines.
    The 22-year-old tennis star, who is currently ranked 25th in the world, was arrested on Wednesday at the W Hotel in Miami after other guests complained about the noise coming from Tomic's $7,000-a-night penthouse suite.
      It's not his first brush with the law. He's racked up multiple speeding fines including one in his Ferrari and in 2012, police were called after reports that Tomic and another man were brawling outdoors at a Surfer's Paradise, Australia apartment complex. He's been getting criticized for tanking on court, not trying in matches, and snapping at reporters. And when he was a brash young 16-year-old the prodigy snubbed Aussie tennis legend Lleyton Hewitt's offer of a hit-around, saying the Grand Slam winner wasn't "Good enough."
      Nick Kyrgios
      Australia's Nick Kyrgios argues a line call with the umpire during a Wimbledon match.
      Another young Aussie tennis hotshot (and hothead), 19-year-old Nick Kyrgios's on-court prowess has caught global attention but so has his sometimes less than sportsmanlike behavior. The ATP's 41st highest-ranked player's indiscretions seem t