"The greatest genius sportsman there has ever been."
A pretty bold claim by anybody's standards, but that is Steve Davis' verdict on Ronnie O'Sullivan, who clinched his third world snooker title on Monday after totally dominating the tournament from start to finish.
O'Sullivan's battles with depression and substance abuse are well documented, almost as much as his extraordinary talent with a snooker cue in his (left or right) hand. The 'tortured soul' amateur psychoanalysis has been conducted time and time again.
But does he deserve Davis' accolade in a world where the likes of Garrincha, George Best, Maradona, Ayrton Senna, Muhammad Ali, Tiger Woods or Jack Nicklaus (feel free to point out the inevitable omissions) all have realistic claims on the same description?
In fairness, Davis does qualify his statement, acknowledging that, for instance, Woods and Roger Federer win in their sports with far greater consistency.
But Davis sticks to his claim that O'Sullivan is the best there has been "as a pure genius".
O'Sullivan's domination of snooker is almost absolute at the moment, with no player able to get close to him when he is at his best.
His three world titles move him into third place on the all-time list behind only Davis and seven-time winner Stephen Hendry, while his three 147 maximum breaks this season have merely underlined his breathtaking ability.
Like many other sporting geniuses, O'Sullivan's life away from the cocoon of competition and excellence in his chosen field has been far from plain sailing.
That does seem to be improving for the 32-year-old, with the two young children in his life helping him to settle down.
But the unpredictable part of his personality was clear to see when, even in the moment of his triumph at The Crucible, O'Sullivan suggested - not for the first time - that he may walk away from the sport. Or he may take a break. Or he may come back and win more world titles. Who knows?
So where does O'Sullivan rank among sport's all-time geniuses? Does he merit a place alongside the likes of Ali and Maradona? And how much more can he achieve in snooker?