FINAL ROUND LEADERBOARD: -11 Y Tseng (Tai) -10 K Hull (Aus) -7 N Choi (Kor), K In-Kyung (Kor) Selected others: -6 A Yang (Kor), C Kerr (USA), S Hee-Kyung (Kor) -4 M Pressel (USA) +2 B Brewerton (Wal)
Tseng holes putt to win Women's Open
Taiwan's Yani Tseng held off a late challenge from Katherine Hull to clinch the Women's Open by one shot.
Tseng, 21, who has led the tournament since Thursday evening, had been four shots clear at the start of the day.
But bogeys at third, eighth and 10th holes allowed Australian Hull the chance to hit back at Royal Birkdale.
Two birdies on the back nine closed the deficit to one stroke but Hull's hopes of forcing a play-off ended following a poor third shot on the 18th.
After just missing out on a birdie when a 20-foot putt lipped out on the par-five 17th, Hull was given further encouragement when Tseng's tee shot at the 18th found the sand.
I was very nervous, especially the last few holes
Tseng opted for safety while Hull attacked the green but just overhit her second shot as the ball landed about 25 yards in the rough.
An excellent third approach shot ensured Tseng landed six yards of the hole while Hull's fading hopes for victory evaporated as she underhit her third shot well short of the hole.
Tseng tapped in to card a one over 73 and take her major tally to three having won the Kraft Nabisco Championship earlier this year and the LPGA Championship in 2008.
Sights and sounds of the Women's Open
"I was very nervous, especially the last few holes," said the world number five, who pockets £260,000 in winnings.
"I was so tired today, there was so much pressure and expectations - it was an unbelievable day for me.
"A four-shot lead on this golf course is nothing. She [Hull] really pushed me a lot and it was so close. She was pretty awesome."
Tseng becomes the youngest golfer ever to win three LPGA majors.
For Hull, who had only one top 10 in 23 previous majors, it was a day of mixed emotions.
"I'm disappointed but there are also a lot of positives to take from this week," she said. "I never gave up but it's just a pity I couldn't make a birdie at one of the three long holes at the end."