Only seven players have won snooker's 'Big Three' titles: the World Championship, UK Championship and Masters.
They are Steve Davis, Alex Higgins, Terry Griffiths, Stephen Hendry, Ronnie O'Sullivan, John Higgins and Mark Williams.
Shaun Murphy and Peter Ebdon each have a chance to join that elite list this week but they have their work cut out today against two of the players who have already completed the hat-trick.
Ebdon is up against O'Sullivan, who hammered him 9-3 in the last 16 of last month's UK Championship.
The 2002 world champion started poorly against Marco Fu before growing stronger to beat him 6-2 in his opening match.
He will have to play much better to stand a chance against O'Sullivan, who currently leads him 18-11 in past meetings.
Murphy played very well to see off Hendry 6-4 and will be looking to reach the Masters semi-finals for the first time in six Wembley appearances.
He tackles Williams, who produced a typically wily performance in beating Ali Carter despite his car accident.
It's a tough match for Shaun but he cued superbly against Hendry and must start out as the more likely to complete the triple crown than Ebdon, whose form has become more erratic over the last couple of seasons.