Alex O'Brien and Jonas Björkman both reached what World ranking in doubles?
Jonas Björkman Jonas Lars Björkman (] ; born 23 March 1972, Alvesta, Sweden) is a former World No. 4 Swedish professional tennis player. He is also a former World No. 1 in doubles. Björkman retired from professional tennis after competing at the 2008 Tennis Masters Cup Doubles championships.
Sam Querrey Sam Austin Querrey ( ; born October 7, 1987) is an American professional tennis player who is currently ranked world No. 16 in men's singles by the Association of Tennis Professionals (ATP). Known for his powerful serve, Querrey holds the record for consecutive service aces: 10. He is also a capable doubles player, with five doubles titles and a career-high doubles ranking of world no. 23.