In the course of the most recent decade 16 players who have positioned in the main 50 have been more than once hailed to the tennis respectability unit over suspicions they have tossed matches.
The greater part of the players, including champs of Grand Slam titles, were permitted to keep contending.
The Tennis Integrity Unit - set up to police the game - said it had a zero-resistance way to deal with wagering related debasement.
The reserve of records went to the BBC and Buzzfeed News incorporate the discoveries of an examination set up in 2007 by the sorting out body, the Association of Tennis Professionals (ATP).
Its occupation was to investigate suspicious wagering action after an amusement including Nikolay Davydenko and Martin Vassallo Arguello. The two players were cleared of damaging any tenets however the examination formed into a much more extensive enquiry investigating a web of card sharks connected to top-level players.
The reports we have gotten demonstrate the enquiry discovered wagering syndicates in Russia, northern Italy and Sicily making a huge number of pounds wagering on diversions agents thought to be settled. Three of these diversions were at Wimbledon.
In a private report for the tennis commanding voices in 2008, the enquiry group said 28 players included in these amusements ought to be examined yet the discoveries were never caught up. Tennis presented another against debasement code in 2009 however in the wake of taking legitimate guidance were told past defilement offenses couldn't be sought after.
"Subsequently no new examinations concerning any of the players who were specified in the 2008 report were opened," a TIU representative said.
In resulting years there were rehashed cautions sent to the TIU around 33% of these players. None of them was taught by the TIU.
A gathering of shriek blowers inside tennis, who needed to stay mysterious, as of late passed the reports on to the BBC and Buzzfeed News. We reached Mark Phillips, one of the wagering agents in the 2007 enquiry, who told the BBC they found there was rehashed suspicious wagering action around an unmistakable gathering.
"There was a center of around 10 players who we accepted were the most well-known culprits that were at the base of the issue."
He has never talked freely about the material he accumulated, which he said was as intense as any he had seen in more than 20 years as a wagering agent.
"The proof was truly solid. There seemed, by all accounts, to be an okay opportunity to check it from the beginning and get a solid hindrance out there to find the primary rotten ones."
The BBC and Buzzfeed were additionally gone on the names of other current players the TIU have over and again been cautioned about by wagering associations, sports respectability units and expert card sharks.
A hefty portion of these players have been on the radar of the tennis powers for inclusion in suspicious matches about-facing to 2003.
The BBC and Buzzfeed News have chosen not to name the players on the grounds that without access to their telephone, bank and PC records it is unrealistic to figure out if they might have been specifically partaking in match altering.
However tennis' honesty unit has the ability to request this proof from any expert tennis player.
"There is a component of really holding things under wraps," said Benn Gunn, a previous police boss constable who directed a noteworthy audit of wagering in tennis that prompted the formation of the Tennis Integrity Unit.
It's the first occasion when he has freely talked about his worries.
"In the event that they were truly genuine about managing this then they truly need to make a honesty unit with teeth," he said.
The European Sports Security Association, which screens wagering for driving bookmakers, hailed up more than 50 suspicious matches to the TIU in 2015.
The association announced that tennis pulls in a larger number of suspicious betting movement than other game.
Nigel Willerton, executive of the TIU, said while it respected the backing of the wagering business, "it is not the part of wagering organizations to make judgements about degenerate movement".
He included: "All trustworthy data got by the TIU is broke down, evaluated, and examined by profoundly experienced previous law-implementation agents."
The issue of suspicious wagering and coordinate altering is not leaving. Eight of the players more than once hailed to the TIU over the previous decade are because of play in the Australian Open which begins on Monday 18 January.
