Having lost both of the previous two sessions 5-3, Mark Selby trailed the 2006 champion Graeme Dott 10-6 at the Betfred.com WorldChampionship.
Selby won the scrappy opener, then produced one of the clearances of the tournament in the second of the morning.
Dott bidding to reach the final for the third time, looked certain to restore his four frame margin in the second of the morning.
He had constructed a faultless 60 break until missing an easy red. Selby with proven nerves of steel,began to chip away at his task and on potting the final black for a 66 clearance he punched the air.
The Scot refused to be phased by this disappointment and replied immediately with 57 to clinch his first frame of the day.
Selby battled again taking the last before the break, and as a result of his efforts reduced the arrears at 11-9.
Obviously no stranger to the big occasion, Selby the Leicester cueist a two times Masters champion and a Welsh Open winner was clearly relishing the fight.
After the mid-session, Selby was to draw within a single frame of the tenacious Scot with a solid 67 break.
With his place guaranteed in the elite top sixteen, Dott stood resolute to the Selby charge. He controlled the next two and despite a gutsy effort from Selby in the last he maintained his original four frame advantage going into the final session this evening leading 14-10.
They play to a conclusion at 7pm