It turns out quite a number of players are involved in this match-fixing racket.
16 players, including the winners of Grand Slam titles, have been implicated in a massive match-fixing scandal that has rocked the world of tennis of the eve of the Australian Open.
The BBC and Buzzfeed News have revealed details of secret files exposing evidence of widespread match-fixing at the highest level of tennis, including at Grand Slam events such as Wimbledon.
The documents show that betting syndicates in Italy and Russia made large amounts of money on games that are believed to have been fixed.
16 players, all of whom have ranked in the Top 50 at some stage, were flagged repeatedly to the Tennis Integrity Unit (TIU) on the suspicion that they may have thrown matches they were involved in.
An investigation was set up by the Association of Tennis Professionals (ATP) in 2007 after an extremely suspect match between Nikolay Davydenko (below) and Martin Vassallo Arguello, following which both players were cleared of any wrongdoing.
A subsequent investigation in 2008 flagged that as many as 28 players should be investigated on suspicions of match-fixing, but no players were disciplined by the TIU as a result.
The match-fixing scandal, which you can read about in more detail here and which Andy Murray shared a link to via his Twitter account last night, has rocked the world of tennis ahead of the Australian Open, in which eight players suspected of match-fixing over the past decade will compete.
— Andy Murray (@andy_murray) January 17, 2016