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.
2010 Barcelona Open Banco Sabadell – Doubles Daniel Nestor and Nenad Zimonjić defend their 2009 title. They defeated Lleyton Hewitt and Mark Knowles in the final (4–6, 6–3, [10-5]).