Veteran Paul Broadhurst needed a closing birdie for a round of 67 to retain his Portuguese Open title with a one-shot win at Penina.
GB&Ire unless stated
-17 P Broadhurst (Eng)
-16 A Wall (Eng)
-15 A Romero (Arg)
-14 R Gonzalez (Arg), C Schwartzel (SA)
-9 B Davis
-6 I Woosnam, Pa Lawrie
The 40-year-old began the final round one behind Ricardo Gonzalez, who could only shoot a 71 for a share of fourth.
Broadhurst bogeyed the 17th but held his nerve at the par-five final hole.
Anthony Wall had an eagle and a birdie in successive holes to turn in 32, but consecutive bogeys halted him and he finished with a 67 for second place.
Wall had a chance for an eagle at the last which would have put him a shot ahead of Broadhurst, but he left the long-range putt a foot short.
After his round he moved to the practice putting green, sensing only his second Tour title following a maiden win six years ago.
Broadhurst, who birdied five of the opening seven holes, opted for the driver from the final tee and hit a fine shot to the left-hand side of the fairway.
He pulled his second, however, which finished on a grassy bank above the green to the left.
But a majestic chip rolled up two feet from the pin and Wall, munching on an apple, returned to the clubhouse and admitted defeat.
Meanwhile, Ryder Cup captain Ian Woosnam, who missed the cut in his first three events, posted a second successive round of 69 to finish six-under.
Broadhurst's victory took him to fifth in the European standings but he insisted there was "a long way to go" before the possibility of a Ryder Cup place.
He did touch on the big event, taking place in Ireland in September, and said: "I was pleased with the way I handled myself out there. I thought if I am going to get in the Ryder Cup I've got to handle the pressure and I think I did."
Broadhurst revealed that he was unaware of exactly how close the tournament was until the final stages.
"There's no scoreboards so I had no idea what was going on until the 16th," he said.
"I thought 'I'm not going to have a better chance of winning than this' but I made it hard work down the stretch."
Of the nerve-jangling chip from the bank at the final hole, Broadhurst said: "I just tried to treat it like a normal day when it wouldn't be that difficult."