As tennis is engulfed in a match-fixing scandal, the assertion is that many players who have been ranked in the world's Top 50 may have thrown games.

Simon Cox, the BBC journalist at the centre of the probe, detailed the extent of the match-fixing problem when he spoke to Off The Ball last night.

As Cox explained, in the documentary evidence, "they found that, as they called it, very strong evidence linking gambling syndicates in Russia and Italy to tennis players".

Men's world No 1 Novak Djokovic also added his voice to the debate when he revealed that an offer had been made to his team to throw a match in return for financial reward - one that he rejected.

In all, 16 players who have ranked in the Top 50 have been "flagged" by tennis' integrity unit over alleged involvement in match-fixing.

In a tweet last night, former US Open champion and Wimbledon finalist Andy Roddick - who says those involved lack "a moral compass" - said he got a text from another player who said they could guess the identities of about half of that number:

Text I got from another former tour pro "we should see how many of the 16 betting guys we can name. I think I got at least 8-9. "

— andyroddick (@andyroddick) January 19, 2016