Alex O'Brien and Jonas Björkman both reached what World ranking in doubles?
Alex O'Brien Alex O'Brien (born March 7, 1970 in Amarillo, Texas) is a retired professional tennis player from the United States, who competed on the ATP Tour. He became the world No. 1 doubles player in May 2000 and was ranked as high as world No. 30 in singles in June 1997.
Lee Yong-dae Lee Yong-dae (Hangul: 이용대; Hanja: 李龍大; ] ; born September 11, 1988) is a former professional badminton player from South Korea who had been successful in both men's and mixed doubles. He reached world number 1 ranking with 4 different partners, Chung Jae Sung, Ko Sung Hyun and Yoo Yeon Seong in Men's Doubles, and Lee Hyo Jung in Mixed Doubles. He won a total of 43 Superseries titles, 37 in the men's doubles, the most of any doubles player in one discipline, and 6 in mixed doubles. He was ranked world number 1 in men's doubles for 104 consecutive weeks with his last partner, Yoo Yeon Seong.