Stars in action
Going for a maximum 147 are snooker greats Shaun Murphy and Mark Williams.
Representing the nine-darter is current and former world champs Luke Humphries and Michael van Gerwen.
And finally, at Hertsmere Golf Club's 141-yard par three we have top pros Matt Wallace and Ross Fisher.
Sport's biggest debate to be settled?
A 147, a hole-in-one or a nine-darter - which is harder?
Today we are going to find out.
Paddy Power's Perfect Challenge is coming your way from 12pm.