Sjeng Schalken defeated Tommy Haas 6–4, 6–4 to win the 1999 Heineken Open singles competition. Marcelo Ríos was the defending champion.
David Macpherson and Grant Stafford were the defending champions but only Macpherson competed that year with Andrew Florent.
Jonas Björkman and Todd Woodbridge were the defending champions, but lost in the second round to Tomáš Cibulec and Daniel Vacek.
The 1995 Dutch Open was an ATP men's tennis tournament held in Amsterdam, Netherlands, after being transferred from Hilversum, and played on outdoor clay courts. It was the 37th edition of the tournament that was part of the World Series of the 1995 ATP Tour and was held from 24 July until 30 July 1995. Unseeded qualifier Marcelo Ríos won his second title of the year, and the second as well of his career.
Martin Damm and Cyril Suk were the defending champions but lost in the final 6–4, 6–4 against Paul Haarhuis and Sjeng Schalken.
Sjeng Schalken was the defending champion but lost in the quarterfinals to Michel Kratochvil.
Mahesh Bhupathi and Leander Paes were the defending champions but did not compete that year.
Paul Haarhuis and Sandon Stolle were the defending champions but only Stolle competed that year with Sjeng Schalken.
Jacco Eltingh and Paul Haarhuis were the defending champions but only Haarhuis competed that year with Sjeng Schalken.
Richard Krajicek and Jan Siemerink were the defending champions but lost in the first round to Kenneth Carlsen and Frederik Fetterlein.
Menno Oosting and Libor Pimek were the defending champions but they competed with different partners that year, Oosting with David Adams and Pimek with Peter Nyborg.
Paul Haarhuis and Sjeng Schalken were the defending champions, but did not participate this year.
Jim Grabb and Richey Reneberg were the defending champions, but did not participate together this year. Grabb partnered Wayne Black, losing in the first round. Reneberg partnered Sjeng Schalken, losing in the first round.
Pete Sampras was the defending champion.
Donald Johnson and Jared Palmer were the defending champions, but lost in the semifinals to Jonas Björkman and Todd Woodbridge.
The 1995 US Open was a tennis tournament played on outdoor hard courts at the USTA National Tennis Center in New York City in New York in the United States. It was the 115th edition of the US Open and was held from August 28 to September 10, 1995.
Since the 1999 final was cancelled due to rain, no defending champions were declared.
Ivan Lendl was the last champion of the tournament in 1994, but retired from professional tennis at the same year. The 1995 final was suspended due to rain.
Tom Kempers and Daniel Orsanic were the defending champions, but Kempers did not compete this year. Orsanic teamed up with Tomás Carbonell and lost in the second round to Jürgen Melzer and Alexander Peya.
Jacco Eltingh and Paul Haarhuis were the defending champions, but Eltingh did not compete this year.
Marcelo Ríos 
Sjeng Schalken 
Wayne Arthurs 
Neil Broad 
