Judd Trump currently holds a commanding 12-4 lead over China's Ding Junhui in the quarter-finals of the World Championship in Sheffield, England, on Tuesday.
Trump, aiming to reach the final for the first time since 2011, jumped ahead 6-2 in the first session and opened the second session with a century, and took the next two to go 9-2 ahead, before Ding pulled two back.
Trump then stroked in 127 and 116 on his way to taking the last three frames of the session for a comfortable lead.
The two will settle up when play resumes tomorrow. The winner will face either Ronnie O'Sullivan or Stuart Bingham.