Nathan Green beat Retief Goosen in a play-off to win the rain-delayed RBC Canadian Open and land his first PGA Tour victory.

A par on the second hole at at the Abbey Golf Club at Oakville proved decisive in the first Monday finish in the event since 1988.

Australia's Green missed a 12-foot birdie attempt on the par-four 17th, before South Africa's Goosen missed with an eight-foot attempt for par.

Earlier, Green completed a third-round 69 with an eagle on the 18th hole and shot a 68 in the fourth round, while Goosen three-putted the 18th for par and a 67 in the morning, then eagled it in the afternoon for a 69.

Goosen had a putt to win on the 18th - the first extra hole - but missed a six-foot putt for birdie after leaving his bunker shot above the hole

Green, who took the European Tour's New Zealand Open in 2006, told www.pgatour.com: "It's a huge surprise to finally win. This is where I started my professional career."

Anthony Kim and overnight leader Jason Dufner were tied for third after one over par final rounds of 73, four strokes back at 14 under in an event marred by nearly five inches of rain the first four days.

Lee Janzen finished with a 67 for a share of fifth, one shot further back, alongside Brandt Snedeker and Jerry Kelly.

Scotland's Martin Laird had a good final round, with a seven under par 65 seeing him finish seven shots off the pace, while England's Luke Donald - who finished tied fifth at the Open last weekend - was a stroke further back on 278 after a final round 71.

Collated final-round scores (USA unless stated, par 72):

270 Nathan Green (Aus) 68 65 69 68 (Nathan Green won at the second play-off hole), Retief Goosen (Rsa) 65 69 67 69

274 Anthony Kim 69 66 66 73, Jason Dufner 68 63 70 73

275 Jerry Kelly 65 67 72 71, Lee Janzen 68 70 70 67, Brandt Snedeker 73 67 67 68

276 Michael Letzig 69 67 66 74, Scott McCarron 68 71 67 70, Christopher Baryla (Can) 69 71 70 66, Bob Estes 67 67 68 74, Mark Calcavecchia 71 65 71 69, Scott Verplank 65 67 71 73, Stephen Ames (Can) 68 69 72 67, Y.E. Yang (Kor) 69 66 73 68

277 Peter Tomasulo 65 68 72 72, J.B. Holmes 73 67 67 70, Chris Riley 68 70 70 69, Tim Herron 67 68 71 71, Martin Laird (Sco) 65 69 78 65, Bryce Molder 71 69 70 67, Briny Baird 72 63 70 72, Webb Simpson 71 68 67 71

278 Pat Perez 67 67 72 72, Jeff Quinney 71 69 65 73, Scott Sterling 67 68 72 71, Mike Weir (Can) 71 67 69 71, Luke Donald (Eng) 71 69 67 71, Camilo Villegas (Col) 63 71 72 72, Mark Wilson 68 71 69 70

279 Patrick Sheehan 68 70 70 71, Joe Durant 65 74 68 72, Dean Wilson 68 70 69 72, Corey Pavin 68 70 72 69, Kevin Streelman 72 68 71 68

280 John Merrick 70 68 70 72, Leif Olson 68 71 68 73, Harrison Frazar 68 71 70 71, Kevin Sutherland 68 69 70 73

281 Derek Fathauer 66 74 73 68, Daniel Chopra (Swe) 70 68 69 74, Darron Stiles 69 71 68 73, Ken Duke 66 71 74 70, Scott Piercy 71 69 69 72, Steve Elkington (Aus) 68 71 75 67

282 D.A. Points 68 71 66 77, David Peoples 67 73 76 66, Graham Delaet (Can) 73 66 72 71, Billy Mayfair 69 69 70 74, Jimmy Walker 66 70 74 72, Jamie Lovemark 74 66 69 73

283 Jason Day (Aus) 70 70 72 71

284 Kevin Na 63 71 74 76, Nicholas Thompson 73 66 73 72

285 Kevin Stadler 70 70 76 69, Frank Lickliter II 68 72 72 73

286 Brendon De Jonge 67 73 75 71

287 Jay Williamson 70 68 77 72

288 Charles Warren 70 68 69 81, Dicky Pride 70 70 76 72

289 Mike Grob 70 69 75 75

291 Andres Gonzales 71 69 79 72, Parker McLachlin 66 72 74 79