Q&A: The story so far in sport’s latest scandal - investigation into match-fixing in tennis

An investigation carried out by the BBC and Buzzfeed alleges the tennis authorities have consistently failed to act on warnings that a number of top-level players could have been involved in match-fixing.

What are the claims being made?

The allegations effectively come in two parts: firstly, that the tennis authorities failed to act on a dossier of suspicious matches which was presented to them by investigators in 2007, and that the subsequently-formed Tennis Integrity Unit (TIU) has remained similarly silent over information concerning a “core group” of 16 players — reported to include Grand Slam champions — alleged to have been repeat offenders over the past decade.