Who was the first person to win a Wimbledon singles title on a tiebreak?

Fourth-seeded Evonne Goolagong Cawley defeated Evert Lloyd in the final, 6–1, 7–6(7–4) to win the Ladies' Singles tennis title at the 1980 Wimbledon Championships. The second-set tiebreaker in the final was the first tiebreak ever played in the ladies singles final at Wimbledon and the match was the first ever singles final (men's or women's) to end on a tiebreak.

Evonne Fay Goolagong Cawley (born 31 July 1951) is an Australian former world No. 1 tennis player. She was one of the world's leading players in the 1970s and early 1980s, the number one Australian pro on tour after the retirement of Margaret Court. Goolagong Cawley won 14 Grand Slam titles: seven in singles (four at the Australian Open, two at Wimbledon and one at the French Open), six in women's doubles, and one in mixed doubles.