Snooker professional Marco Fu Ka-chun is still hankering for a return to the world circuit, although it is unlikely to be this season. And when he does play again, it will be with a different attitude. Earlier this year, the World Snooker Tour handed out four invitational tour cards and the Hong Kong player, a two-time World Championship semi-finalist, was one of the recipients along with former world champions Stephen Hendry and Ken Doherty, and Jimmy White, a six-time Crucible runner-up. However, the 43-year-old has yet to make a start this season and has not played since returning from the…