Mo Farah, the double Olympic champion, says he will run half the London Marathon this year, before stepping up to debut over the full distance in 2014. The Londoner has always been open about his desire to try out the feted course and on 21 April he will run alongside a stellar list of names.
When Roger Federer this week called for the introduction of biological passports in tennis, the man with the most polished image in the sport hit a clean winner. As the most popular player in the world, an influential member of the ATP players' council, the owner of 17 grand slam titles and a magnet for high-level endorsements that lift his annual earnings beyond $50m (£32.2m) a year Federer is listened to at all levels of the game.
Boxing has an almost insoluble dilemma. Suspicions have been rife for the past few years that several top-flight boxers use performance-enhancing drugs (a couple have even been caught, while others have proclaimed their innocence, in and out of court), but the cancellation of a major fight costs fighters and their connections – as well as promoters and their television backers – so many millions that there is little collective will for discovery.
The American wrestling community has reacted with dismay to the news that the International Olympic Committee has voted to remove the sport from the summer Olympic Games in 2020.
Toni Minichiello, the coach who guided Jessica Ennis to Olympic gold, has accused British Athletics chiefs of a "lack of respect" after he was offered a reduced package – on a consultancy basis – to continue working with one of the world's most successful athletes.
Tom Gibson reports on the world of ironman.
Andy Murray and Novak Djokovic, like Roger Federer and Rafael Nadal for so long before them, have a special relationship.
After the confession, the lawsuits. Lance Armstrong's extended appearance on the Oprah Winfrey network, in which the man stripped of seven Tour de France wins finally admitted to doping, has opened him up to several multi-million dollar legal challenges.
The IAAF president, Sebastian Coe, is facing a fresh crisis after an email was leaked showing that his right-hand man knew about a number of Russian doping cases in 2013, and discussed a secret plan to delay naming those involved before the World Championships in Moscow that year.
Jessica Ennis-Hill is everywhere.
Respect filled the air in Manchester on Saturday night – too much of it for many of the 7,000-plus customers, probably – but Billy Joe Saunders, the new champion, and Andy Lee, the departing king, brought a good deal of honour to their sport and their community during 12 tense rounds for the WBO middleweight title.