Jordan Brown sealed one of snooker's greatest upsets as he beat six-time world champion Ronnie O'Sullivan in a final-frame decider to clinch the Welsh Open title at Celtic Manor on Sunday. The world number 81, who started the tournament as a 750-1 outsider, held his nerve to clinch a 9-8 win and become the lowest ranked winner of a ranking title in over a quarter of a century. A brilliant break of 74 in the decider completed victory for the Northern Irishman. The 33-year-old won four consecutive matches in final-frame deciders before sweeping aside Stephen Maguire 6-1 in the semi-finals. Despite letting a 4-1 lead slip as O'Sullivan went 6-5 ahead, Brown took the next two to move two frames from victory. O'Sullivan twice levelled again, but Brown held his nerve to pocket the £70,000 ($98,000) winner's cheque. kca/nr