Jill Douglas presents coverage of snooker from the Marshall Arena in Milton Keynes. One of snooker's most prestigious tournaments features 16 winners from the past 12 months of the World Snooker Tour. Last year's winner Neil Robertson returns to defend his title and heads an all-star cast including World Champion Ronnie O'Sullivan, World Number One Judd Trump and Masters winner Stuart Bingham, but only one can be crowned the Champion of Champions. Group action this afternoon sees two best-of-seven-frame semi-finals. The winner of each will meet in tonight's group final, before the Champion is crowned on Sunday night. Analysis is by Stephen Hendry, Ken Doherty and Alan McManus, while commentary comes from Neal Foulds and Phil Yates.