Siemerink won four tournaments in singles and eleven in double and could always surprise you with individual victories against the best tennis players in the world. He defeated nine of the former world number one.
His greatest successes, however, he reached in a double with tournament victories at the Masters Series tournaments in Monte Carlo and Key Biscayne ( Miami Masters ).
Since January 2007 Jan Siemerink is the captain of the Dutch Davis Cup team. His biggest success to date as a team captain was to qualify for the World Group in 2009. Netherlands but was defeated in the very first round of Argentina 0-5. For the World Group 2010 Siemerink could not qualify with his team.
Tournament Win - Double
Siemerink won 11 tournaments in his career in doubles. The two most important tournament victories were the Masters tournaments in Monte Carlo and Key Biscayne ( Miami Masters ).
Siemerink occurred in the years 1991 to 2001 for the Netherlands 21 times in single ( 13 wins ) and 6 times in doubles in Davis Cup. He chose 13 single and 4 double matches for itself. His biggest success was the semi-finals of the World Group in 2001. Quarter-final Siemerink could with wins against Nicolas Kiefer and David Prinosil to 4-1 contribute significantly against Germany.