Ronnie O'Sullivan-John Higgins last-16 tie set for thrilling finish at World Snooker Championship

John Higgins (left) and Ronnie O'Sullivan are playing in their seventh match against each other at the Crucible. Both players three of the first six

The World Championship last-16 tie between Ronnie O'Sullivan and John Higgins is set for a thrilling finish on Monday after the Scot won the last three frames of the second session to close the deficit to only two.

Seven-time Crucible winner O'Sullivan led 6-2 following Saturday's first session and the match looked over when he stretched that advantage to 9-4 in the first-to-13 match.

But fellow 'Class of 92' member Higgins, with four world titles himself, fought back on a night of high drama to leave O'Sullivan 9-7 ahead, needing four more to claim victory.

The 50-year-olds play the final session of an enthralling match from 13:00 BST on Monday, with the match live on BBC Two.