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Mark Selby is through to the British Open semi-finals after overcoming Jack Lisowski 5-4 in a thrilling contest in Cheltenham.<\/span><\/p>\n The four-time world champion lost the first two frames but won next three to take the lead, only to be twice pegged back to force a decider.<\/span><\/p>\n<\/div>\n A break of 65 in a total of 103 finally saw Selby over the line and set up a semi-final with China’s Xiao Guodong.<\/span><\/p>\n Mark Williams is also through after thrashing China’s Fan Zhengyi 5-1.<\/span><\/p>\n The three-time world champion hit breaks of 138, 68, 61 and 109 to wrap up victory in just over an hour, finishing the match with a 97% pot success rate.<\/span><\/p>\n Welshman Williams will play Hossein Vafaei in the last four after the Iranian fought back from two frames down to beat China’s He Guoqiang 5-2.<\/span><\/p>\n China’s Xiao set up his last-four meeting with Selby by hitting four fifty breaks and a tournament-high 140 to beat England’s Tom Ford 5-3.<\/span><\/p>\n<\/div>\n