World Rowing is the latest body to call for testing for viruses in Rio's Olympic waters after a report showed a health risk.
With one year to go until the Rio Olympics, BBC Sport assesses Team GB's chances of surpassing their record medal tally.
Undefeated American Floyd Mayweather will attempt to match Rocky Marciano's record of 49 victories without defeat against Andre Berto.
A year ahead of the Olympic Games in Rio, five remarkable athletes from across the globe tell their compelling stories.
Jack Green and Nigel Levine are added to Great Britain's squad for the World Championships after successful appeals.
Australia fast bowler Mitchell Johnson shrugs off the persistent barracking he is receiving from England supporters in the Ashes.
Britain's James Guy wins 200m freestyle gold at the World Swimming Championships while Adam Peaty sets new 50m breaststroke record.
Allegations of widespread doping in athletics are "sensationalist and confusing", according to the sport's governing body.
A pub receives an apology after claims Northampton Saints rugby players smashed glasses, intimidated staff and urinated in a garden on a night out.
James Hook says he is "shocked but thrilled" after being selected at fly-half for Wales' World Cup warm-up against Ireland.
Surrey reach the One-Day Cup quarter-finals with a 36-run win over a Worcestershire side that are all but eliminated.
Mahela Jayawardene is in talks over a role as a batting consultant during England's series against Pakistan in the UAE.
Fulham pay an undisclosed fee to Norwegian club Aalesunds for Finland player Sakari Mattila, who has agreed a two-year deal.
Ronny Deila says Celtic have prepared well for their Champions League qualifier, and dismisses talk of a bid for Virgil van Dijk.
Leeds Rhinos announce hooker Paul Aiton is to leave the club at the end of the season and is set to join Catalans Dragons.
Shakhtar Donetsk were free to pick midfielder Fred for a Champions League match, despite him failing a doping test say Uefa.
Boxer Anthony Joshua and cricketer Moeen Ali have fun swapping sports for an afternoon.
Warrington half-back Chris Sandow believes he can make an impact in Super League following his move from the NRL.
Manchester United set for £20m Pedro deal, Chelsea to bid £30m for John Stones, Gareth Bale will stay at Real Madrid, plus more.
Sam Burgess says he has no concerns about competing for a World Cup place in the midfield, despite switching to the back-row for Bath.
Manchester United's Angel Di Maria says he is "very happy" to be joining Paris St-Germain, a year after moving to Old Trafford.
Gareth Bale scores against former club Tottenham Hotspur to secure a 2-0 pre-season friendly win for Real Madrid in Germany.
Manchester City striker Edin Dzeko is set to join Serie A side Roma after the clubs agree a £14m fee.
Manchester United should 'rectify' their lack of a senior women's team, says sports minister Tracey Crouch.
Legia Warsaw are awarded a 3-0 Europa League win over FK Kukesi after one of their players was hit by a stone thrown by a fan.
Bowler Stuart Broad says England are "proud" of negating Australia captain Michael Clarke in the Ashes.
Stuart Broad says captain Alastair Cook's message to England ahead of the Fourth Test is "it's all about us".
Bournemouth have a £3m bid accepted for Middlesbrough forward Lee Tomlin.