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Four-time world champion Mark Selby was knocked out of the UK Championship after a surprise 6-4 defeat by Iran’s Hossein Vafaei.<\/span><\/p>\n Selby recovered from 5-3 down and looked poised to force a decider as he led a nervy 10th game, but a loose red allowed Vafaei in to take the victory.<\/span><\/p>\n<\/div>\n Vafaei advances to the last 16 where he faces Jack Lisowski, who cruised past Xu Si 6-1.<\/span><\/p>\n Elsewhere, Judd Trump beat China’s Xiao Guodong 6-5 in a final-frame decider.<\/span><\/p>\n Trump won the event in 2011 and has twice since reached the final but has often struggled to find his best form.<\/span><\/p>\n “My record here is just atrocious,” Trump told the BBC.<\/span><\/p>\n Xiao, the world number 34, led for the first time in the seventh frame but missed the chance to seal victory.<\/span><\/p>\n “Every game seems to go the same – I come well into the tournament then I go out there and I can’t pot a ball,” added Trump.<\/span><\/p>\n “I don’t know what it is. I feel good and I end up messing it up. I’m happy to get through because I love the prestige of this event and I’d have been devastated to be going home after the first game.”<\/span><\/p>\n