NARANGBA'S Dave Littleboy produced the biggest upset on the penultimate night of the inaugural International Pro Darts Showdown Series in Mackay on Saturday.
Littleboy who was originally from Rockhampton, defeated Devon Petersen to leave the South African No.1 without a victory in the News Corp-run four-tournament series.
The 63-year-old was the oldest competitor in the series but outlasted the man half his age, winning 6-5 in a thriller.
Littleboy finished a 116 checkout on double top to stun the South African. Petersen had four darts at double 16 to win the match 6-4 but missed them all, allowing Littleboy to level the game at 5-5.
The retired technician held his nerve in the final leg to set up a quarter-final on Sunday night at Mackay Entertainment and Convention Centre with Kyle Anderson, who defeated Rhys Mathewson for the third time in the series 6-2.
The news was better for American John Kuczinski, who broke his drought in the series with a 6-4 win over Geelong's Tic Bridge.
Johnny K now plays the winner of the Townsville leg of the series, Dimitri Van den Bergh, who was just too good for Lucas Cameron.
Cameron, from Geelong, had chances to get closer to the 23-year-old Belgian but could not take them and ended up losing 6-3.
Phil "The Power" Taylor proved too strong for Kevin McCarthy, defeating the 33-year-old, originally from Cork in Ireland, 6-0.
McCarthy had played Taylor in an exhibition match 17 years previously in Ireland and had the 16-time world champion sign a picture of the occasion on Saturday night.
Taylor will play Andy Hamilton in the last eight on Sunday after his fellow Englishman defeated Kiama's John Bunyard 6-1.
Ipswich's Gordon G Mathers will play fellow qualifier Ray Smith in the other quarter-final after defeating Russell Stewart 6-2.
Smith was too strong for the plucky veteran Scot Jamie Harvey, whose 6-3 loss left him without a win in the series. The Pro Darts Series ends Sunday night in Mackay.