( CNN ) -- Mo Martin produced the performance of her life to secure her first major title with victory at the Women 's British Open at Royal Birkdale Sunday . The 31-year-old secured top spot with a stunning eagle on the final hole to finish one shot clear of Norway 's Suzann Pettersen and China 's Shanshan Feng . Ranked 99th in the world , Martin , from California , was not expected to challenge at the top of the leaderboard . But a second shot at the 472-yard 18th landed just six feet away from the pin -- allowing Martin to putt for glory and secure a famous triumph . `` Is this real life ? '' Martin asked in her post-match interview following her victory . `` It was a tough day of golf today . It was very windy and this course is very challenging . `` So I stayed patient and I fortunately played some really good golf today . `` From the first time I saw Royal Birkdale , I fell in love with it . I think the layout is absolutely phenomenal . '' Inbee Park , who had led overnight , slumped to a disappointing fourth place finish . Meanwhile Justin Rose warmed up for this week 's British Open by winning the Scottish Open at Royal Aberdeen . The Briton 's final round six-under-par 65 gave him victory by two shots , which will move him up to world No . 3 . Sweden 's Kristoffer Broberg 's 14-under par secured him the runner-up spot and a place in the British Open at Hoylake , while Scotland 's Marc Warren was third .
Mo Martin wins the Women 's British Open at Royal Birkdale . Triumph is Martin 's first major victory . Suzann Pettersen of Norway and Feng Shanshan of China a shot further back . Overnight leader Inbee Park finished fourth .