With snooker's World Championship final underway, Ronnie O'Sullivan entered today's conclusion with a reduced lead over Kyren Wilson.
If the Rocket does maintain his lead to the end, he will move within one world title of the modern era record set by Stephen Hendry.
According to Ireland's Fergal O'Brien, who came close to advancing to the final tournament via the qualifiers, feels today is vital for O'Sullivan if he is to match or even beat the record.
"I think this one is very important if he does want to chase down Stephen Hendry and get seven or maybe even eight," he told RTÉ Radio 1's Sunday Sport.
"I think he really needs to win today. If he loses today and he's stuck on five, I'm not sure he'd ever get to seven.
"Because as we've seen, even this week, as brilliant as he is, he can be a bit erratic as well. It's the only record he hasn't got really in snooker so obviously if he wins today, it will be six to tie [Steve] Davis and [Ray] Reardon and then mentally, it's easier for him to say, look, even if he's struggling a bit with the game over the next few years, 'Look, I only have one more'.
"And he only really needs to tie Hendry for it to be beyond doubt for the discussion about who is the greatest of all time."
Regardless of the outcome today, O'Brien is confident that Wilson has the makings of a future world champion.
"[He's] excellent. If not today, definitely a future world champion," he said.
"I actually said this a couple of years ago, that in the next 10 years, I think he'll definitely win the World Championships. He's very strong in all departments and is tough mentally."