Judd Trump has been beaten early at the China Open (Picture: Getty Images)Judd Trump looks set to lose his world number one spot this month after a shock first round defeat to Noppon Saengkham at the China Open. Neil Robertson is world number two, thanks largely to his own win at the Saudi Arabia Masters last year. There have only been 12 world number ones in snooker history, with Robertson one of the players having held top spot before. Robertson gets his China Open campaign underway on Monday against impressive rising Chinese star Chang Bingyu. World number six Shaun Murphy may even fancy his chances of reaching top spot after battering Matt Selt 6-0 in the first round of the China Open.