Kyren Wilson fought back against Gary Wilson to secure a 10-8 win in the World Championship in Sheffield.
Kyren Wilson started the second session 5-4 down, having been 5-1 behind at one point.
However five consecutive frames saw him edge 6-5 ahead, before going two frames in front for the first time in the match after a scrappy 12th.
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Gary Wilson had watched his opponent race back into contention with some exceptionally consistent and ruthless snooker, but was able to pull the deficit back to one when he hit a break of 71.
He then followed that up with a 54 to level the scores at 7-7, leaving the pair in a five-frame shootout.
Kyren Wilson then grabbed a half century of his own, and hit a fluent 119 in the following frame to leave him on the verge of victory.
The game dragged on when Gary Wilson battled his way to 9-8 with another half-century in a match that regularly featured sizable breaks but, with the clock approaching 11pm, Kyren Wilson was able to sneak in with an unanswered 73.
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