Secret files exposing evidence of widespread suspected match fixing at the top level of world tennis, including at Wimbledon, can be revealed by the BBC and BuzzFeed News.
Over the last decade 16 players who have ranked in the top 50 have been repeatedly flagged to the tennis integrity unit over suspicions they have thrown matches.
All of the players, including winners of Grand Slam titles, were allowed to continue competing.
The Tennis Integrity Unit - set up to police the sport - said it has a zero-tolerance approach to betting-related corruption
The cache of documents passed to the BBC and Buzzfeed News include the findings of an investigation set up in 2007 by the organising body, the Association of Tennis Professionals (ATP).