Scott Mitchell edged past Glen Durrant 6-5 to be crowned BDO Red Dragon Welsh Open champion for the first time.
Scotty Dog had earlier beaten former world champions Martin Adams and Scott Waites to book his place in the final, where he took on the top seed and defending champion Durrant.
Duzza took out 132 in a deciding leg to get the better of Dave Parletti in a high-quality semi-final, but looked like his title defence had run its course when Mitchell went 5-3 in front in the final.
However, back-to-back legs from Durrant forced a deciding leg which he would throw first in.
Scotty Dog then produced an excellent final leg, hitting double tops to finish off a 13 darter against the throw to claim the Welsh Open title for the first time.
Elsewhere, Deta Hedman continued her recent dominance by beating Sharon Prins 5-4 to win the Welsh Open ladies title.
Beau Greaves saw off Tamzin Parr 3-0 to lift the Girls trophy, while Cavan Phillips whitewashed Jack Vincent 3-0 to take home the Boys crown.
BDO Red Dragon Welsh Open
Sunday 15 May, Prestatyn Sands Holiday Park, Wales
Glen Durrant 4-1 Micky Stocks
Martin Atkins (York) 4-2 Jeffrey Van Egdom
Darryl Fitton 1-4 Dennis Harbour
Robert Rickwood 2-4 Danny Noppert
Steve Robertson 0-4 Dave Parletti
Michael Brooks 2-4 Adam Beck
Paul Williams 4-0 Jeff Bass
Alan Bell 4-2 Jamie Hughes
Scott Waites 4-0 Bradley Kirk
Sven Verdonck 2-4 Dean Reynolds
Simon Stainton 2-4 Sven Wens
Ryan Joyce 4-1 Jim Williams
Scott Mitchell 4-0 Nathan Perry
Dave Bird 3-4 Martin Phillips
Geert de Vos 4-2 Pip Blackwell
Wouter Yaes 2-4 Martin Adams
Glen Durrant 4-3 Martin Atkins (York)
Dennis Harbour 4-0 Danny Noppert
Dave Parletti 4-1 Adam Beck
Paul Williams 2-4 Alan Bell
Scott Waites 4-2 Dean Reynolds
Sven Wens 1-4 Ryan Joyce
Scott Mitchell 4-2 Martin Phillips
Geert de Vos 3-4 Martin Adams
Glen Durrant 4-1 Dennis Harbour
Dave Parletti 4-3 Alan Bell
Scott Waites 4-3 Ryan Joyce
Scott Mitchell 4-2 Martin Adams
Glen Durrant 5-4 Dave Parletti
Scott Waites 2-5 Scott Mitchell
Glen Durrant 5-6 Scott Mitchell