South Korea's Hyo-Joo Kim has secured her first ever major title with victory at the Evian Championship.
The title went down to the final hole as Webb hit a bogey on the tough 442-yard par four to drop to 10 under, while Kim went the other way as her birdie-three moved her up to 11 under and ensured her a first Ladies Professional Golf Association victory.
"This is the best nervous time ever," said a delighted Kim.
"I was flying like a birdie."
The South Korean had carded a pair of 72s on the second and third rounds of action in France following her record-breaking opening round score of 61.
She went into the final day's play with a one stroke lead over Webb, who was looking to become the only player to have won all six of the different majors that have existed in her lifetime.
Kim started the day strong, holing four birdies across the first 12 holes to sit two shots clear atop the leader board on 12 under.
Despite recording four birdies of her own, a double bogey on the second put Webb three shots down as they came to the 14th tee.
It was here that the tide turned, however, with a birdie for Webb and a bogey for Kim moving the pair to within a stroke of one another.
A second successive birdie moved Webb on par with her South Korean counterpart, before a dropped shot by Kim on the 16th left her trailing for the first time in the round coming onto the final tee.
The topsy-turvy contest was turned on its head again on the final hole though, as Kim found the hole in three to lift the trophy.
Fellow South Korean Ha-Na Jang shot an impressive 65 to tie for third with compatriot Mi Jung Hur, who had led the contest yesterday before a disappointing double bogey on the 16th hole, while another compatriot, Na Yeon Choi, carded a four under 67 to seal fifth.
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