Early exit for Chisnall
Dave Chisnall became the first big name to fall at this year's PDC World Darts Championship when he lost 3-2 to John Henderson.
The St Helens slinger found himself two sets and 2-1 behind in the first-round game before turning the match around, only for Henderson to find a second wind and take the fifth and deciding set 5-3 on a tie-break.
Henderson raced into a two-leg lead before seventh seed Chisnall scored heavily to stopping the rot with a double 16 finish, and then levelled things up by checking out 83 on bull.
But Henderson won the decider against the head with a 122 checkout with Chisnall poised on 32 and then nailed 82 in three darts to open the second set.
Chisnall missed five darts at doubles in the next with Henderson way back, allowing his opponent to eventually extend his lead by checking out 132 courtesy of two bullseyes and double 16.
And while Henderson missed a 118 finish in the third leg, Chisnall couldn't close it out from 54 to gift the bigger man a 2-0 lead in sets.
Chisnall, who famously beat Phil Taylor here two years ago, steadied the nerves when hitting double four to open the third set, but Henderson levelled by nailing 82 with his opponent a mile back and then moved to the brink of victory when checking out 80 after Chisnall had missed a chance to go ahead with one errant dart at double 18.
But Chisnall did checkout 36 in the next to level the set and, with the darts, was able to polish off 121 in the knowledge that his opponent would not be able to finish should he return to the oche.
And when he opened the fourth set with a maximum it was a sign of things to come as he raced through it to level the match and then kick off the decider with a 70 finish as Henderson wilted under the pressure.
However, the Scot then checked out 61 before Chisnall restored his lead by hitting his favoured double 18, however he then missed three chances to close out the match and Henderson's fine finishing once again enabled him to level things up via double 10.
Chisnall won the next with tops but he missed bullseye allowing Henderson to check out 113 and level once more, before the Scot crucially won against the throw with a double nine finish.
A maximum in the eighth leg set Henderson up for the win as he erased 67 by finishing on double top.
"What can I say, I'm absolutely speechless," the likeable Scot told Sky Sports. "I was two sets up and I thought 'where's Chizzy gone' but I knew he'd come back.
"I do feel for him, I've been in this position before missing darts for the match. I just approached that tie-break as if it was the first set.
"It's the first time I've won on this stage so I'd have to say it's the pinnacle of my career."
Former champion Raymond van Barneveld eased into the second round with a 3-0 win against Welshman Jamie Lewis.
Van Barneveld, the 10th seed this year, averaged 98.56 and took out a 141 checkout to seal the result.
But the Duthcman also benefited from Lewis' profligacy on the doubles, the youngster hitting only three of 14 attempts.
"I feel fortunate to have won in straight sets as Jamie played some good stuff," said Van Barneveld, who won the most recent of his five world titles in 2007.
"Jamie did have a quite a few chances to win legs and I was to take the opportunities on offer. The 141 to win the match was pretty crucial as Jamie was in control of the leg and had the throw in the fifth leg.
"I still feel I have another World Championship title in me. I wouldn't be here competing if I didn't have that belief."
Irishman Brendan Dolan got his campaign up and running with a 3-0 success against Colin Osborne.
Dolan took the opening set 3-1 and had a 167 checkout on the way to taking the second in a deciding leg.
And the No 15 seed closed out the victory without further trouble and advances to second-round meeting with Gary Anderson.