Mark Selby claims it is ‘pointless’ for any snooker players to go into a match against Ronnie O’Sullivan without thinking they can beat him. The pair could meet at the Players Championship this week and Selby is upbeat about his chances of beating the seven-time world champion. O’Sullivan has not played a competitive match since beating Alfie Burden in a qualifier for the World Open on January 23. He withdrew from the German Masters in order to prioritise his ‘health and wellbeing’, while he chose not to play the Welsh Open due to ‘anxiety’ and ‘stage fright’. But after almost a month away fro…