Bexhill’s snooker professional came from 5-2 down to defeat Michael Wasley 6-5 and set up a clash against Rory McLeod in the penultimate round this afternoon.
Wasley began the opening frame with a break of 43 only for Robertson to edge it 73-67 thanks to a 25 clearance. A 64 gave Wasley the second 66-5, though, and he also won the third 80-24 helped by a 55.
World number 52 Robertson won another tight frame 78-69 to level at 2-2, but 84th-ranked Wasley reeled off the next three to lie on the brink of victory.
Wasley didn’t concede a point in frames five and six as he rattled through them in a single visit with runs of 89 and 77 before bagging the seventh 54-10.
Robertson stayed alive by claiming the eighth 65-23 despite a top break of just 18. Wasley looked set to close out the match as he began the ninth with a 51, yet Roberton rallied to clinch it 66-52 aided by a 41.
Former world amateur champion Robertson, who lost 4-3 to Wasley at European Tour event two in August, levelled at 5-5 by winning the 10th frame 88-0 via a 73 and pouched the decider 65-31 courtesy of a 62.
It was the second time in less than a week that Robertson has won a match he looked like losing because he came from 2-0 down to win 4-2 against Thanawat Tirapongpaiboon in European Tour event four last Friday helped by breaks of 95, 64 and 62.