Secret files exposing evidence of widespread match-fixing by players at the upper level of world tennis can today be revealed by BuzzFeed News and the BBC. ... It has been seven years since world tennis authorities were first handed compelling evidence about a network of players suspected of fixing matches at major tournaments including Wimbledon following a landmark investigation, but all of them have been allowed to continue playing. ... The investigation into men’s tennis by BuzzFeed News and the BBC is based on a cache of leaked documents from inside the sport – the Fixing Files – as well as an original analysis of the betting activity on 26,000 matches and interviews across three continents with gambling and match-fixing experts, tennis officials, and players. ... Players are being targeted in hotel rooms at major tournaments and offered $50,000 or more per fix by corrupt gamblers. ... as the 2016 Grand Slam season begins on Monday with the Australian Open, former integrity chiefs from within world tennis are breaking ranks to accuse the sport of failing to stamp out match-fixing.