I think the centuries record may well go at this year's Betfred.com World Championship.
From the first day's play, it was clear the pockets were slightly more generous than usual. Balls were going in off jaws that would often stay out.
Also, World Snooker has taken on board the critical comments of players and will re-cloth the tables an extra time this year, which should aid scoring.
There were five tons on the first day compared with six throughout the whole of the 1977 championship, the first to be held at the Crucible.
But, of course, snooker has changed a great deal in the last 32 years.
The record is 68 centuries set at the 2002 championship and equalled two years ago.
Stephen Hendry made the most in a single World Championship - 16 in 2002.
O'Sullivan already has three to his name but will surely need to reach the final to supersede Hendry's record.