Adrian Lewis produced a sensational fightback to inflict Phil Taylor's first defeat of the 2012 Premier League, coming from 4-1 behind to win 8-5 at the BIC in Bournemouth.
Lewis had been the only player to pick up a point against the 15-time World Champion this season following the pair's draw in Manchester on the opening night, but went one further by ended Taylor's nine-game winning to keep his play-off hopes very much alive.
The reigning champion of the world trailed 4-1 at one stage but clawed his way back level before producing a roof-raising 160 checkout as he won the last four legs without reply.
"I missed a couple of doubles early on in the match and at 4-2 down I could have been level if I'd taken my chances," said Lewis. "I came out firing after the break and finished really well.
"If the 160 didn't go in I probably would have lost the game, but massive shots like that change games.
"I'm not in the Play-Offs yet though, and I've got to treat every game like a final now, starting with Gary Anderson in Liverpool next week."
The victory took Lewis up to fourth in the Premier League Darts table above Raymond van Barneveld, after the Dutchman suffered an 8-5 defeat to Simon Whitlock.
Whitlock ncements his place second on 14 points, a tally which is widely beleived to be sufficient to secure qualification. The Aussie is three clear of Lewis and James Wade after picking up his third successive win, which included key finishes of 116 and 155 in successive legs.
"The 155 was lovely, as was the 116, and they changed the match," said Whitlock. "I'm not satisfied with being on 14 points, I want at least another two or four points to make sure I'm in the Play-Offs."
Despite Barney's rampant form in Barnsley at the weekend, the five-time world champion, sporting a new shirt and flights, failed to get going and consequently slips out of the top four.
James Wade, meanwhile had to settle for a draw in his clash with Andy Hamilton, as he The Hammer rescued a point with his last dart for the second week running to cling on to a faint chance of sneaking a Semi-Final spot.
He is joined on eight points by fellow newcomer Kevin Painter, after the Daventry ace heaped yet more misery on Gary Anderson with an 8-4 thrashing.
The Artist moves off the foot of the table (replaced by Anderson) as he ended a five-game losing run with victory over the out of sorts reigning champion, who now appears out of contention.
"A first win in six games probably sounds quite bad but I feel that I've been playing well recently but I've had players like Barney, Phil and Simon put big averages into me," said Painter.
"I'm on eight points and the Play-Offs are still a possibility for me. I might still finish bottom but I'll keep fighting," he added.
The tournament continues at the Echo Arena, Liverpool next Thursday with the 12th of 14 league nights, with the four games including a rematch of last year's Premier League final between Lewis and Anderson, Hamilton's game with van Barneveld, a crucial clash between Wade and Painter and Taylor's clash with Whitlock.
McCoy's Premier League Darts Results
Week 11 - BIC, Bournemouth
Raymond van Barneveld 4-8 Simon Whitlock
Gary Anderson 4-8 Kevin Painter
James Wade 7-7 Andy Hamilton
Phil Taylor 5-8 Adrian Lewis
Latest League Table
P W D L +/- Pts
Phil Taylor (Q) 11 9 1 1 +39 19
Simon Whitlock 11 6 2 3 +6 14
James Wade 11 5 1 5 +1 11
Adrian Lewis 11 4 3 4 -1 11
Raymond van Barneveld11 4 2 5 -11 10
Kevin Painter 11 4 0 7 -10 8
Andy Hamilton 11 2 4 5 -11 8
Gary Anderson 11 3 1 7 -13 7