|Betfred World Snooker Championship|
|Venue: Crucible Theatre, Sheffield Dates: 20 April-6 May|
|Coverage: Watch live on BBC One, BBC Two, Red Button, iPlayer, Connected TV, BBC Sport website and BBC Sport app.|
Stuart Bingham surrendered an 8-1 lead but ultimately resisted one of the great Crucible comebacks to beat fellow former champion Graeme Dott 10-9 in a gripping final-frame decider.
World number 21 Dott rattled off three rapid frames to get back to 8-4 and, despite unluckily losing frame 13, recovered to win five frames in a row.
That run included a beleaguered Bingham losing frame 16 on the three-miss rule.
But although Dott forced the decider, Bingham somehow pulled through.
Elsewhere, Judd Trump trails 6-3 against Thailand's world number 43 Thepchaiya Un-Nooh.
The world number seven, one of the pre-tournament favourites, faces a battle to stay in the tournament, as does Northern Ireland's Mark Allen, who is 7-2 behind against world number 35 Zhou Yuelong of China following a one-sided first session.
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Bingham somehow bounces back
While Allen was struggling, the real drama on Tuesday evening came in an astonishing match on table one which went the distance.
Bingham, the 2015 Crucible winner, had been in complete control and then seemed to be certain to go through when he made the most of a lucky snooker to go 9-4 in front.
Dott, who has made three World Championship finals and won the title in 2006, scored three breaks of 70 or more and a century but just fell short in a nervy final frame.
A mightily relieved Bingham, who faces John Higgins in round two, said: "This morning I felt really comfortable and I didn't do a lot wrong to start with.
"But Graeme started to attack and how I got over the line I will never know. I was shaking in the end.
"Everything was going wrong and against me. It feels like I have lost but I need to press the restart button when I play John."
Had Dott won, it would have been the joint second biggest comeback in Crucible history.
The most impressive famously saw Dennis Taylor overcome a 9-1 deficit to beat Steve Davis to win the 1985 final.
"I am gutted," said Dott, 41. "I can't believe I missed a black off the spot in the final frame. But I am still proud with the way I came back. It's cruel."
In-form Trump in trouble
Trump won the opening frame of their first-round tie only for the relentlessly attacking Un-Nooh to take the next three.
The Masters champion responded with a tournament-high break of 141, but Un-Nooh won three of four for a first-session lead.
The Bristolian has been in imperious form at times this season, winning two ranking events and taking the Masters title with a 10-4 demolition of Ronnie O'Sullivan in January.
But he made too many uncharacteristic errors against the impressive Un-Nooh and has plenty of work to do to keep in the hunt for a maiden Crucible title when he plays to a finish on Wednesday morning.
The other match to play to a conclusion on Tuesday saw world number 16 David Gilbert hold off a spirited fightback by fellow Englishman Joe Perry to reach round two.
Gilbert, making his first Crucible appearance as a top-16 player, was 6-3 to the good overnight and stretched that advantage to 7-3 and 8-4.
One-time world number eight and former Crucible semi-finalist Perry scored breaks of 69 and 72 to add an earlier 136 to get back to 8-7.
But Gilbert, 37, closed out the win to set up a match against defending champion Mark Williams in the last 16.