The 2000 Croatia Open, also known as the International Championship of Croatia, was a men's tennis tournament played on outdoor clay courts in Umag, Croatia that was part of the International Series of the 2000 ATP Tour. It was the 11th edition of the tournament and was held from 17 July until 23 July 2000. Second-seeded Marcelo Ríos won the singles title.[1]
See main article: 2000 Croatia Open – Singles. Marcelo Ríos defeated 
Mariano Puerta, 7–6(7–1), 4–6, 6–3
See main article: 2000 Croatia Open – Doubles. 
Álex López Morón / Albert Portas defeated Ivan Ljubičić / Lovro Zovko, 6–1, 3–6, 6–3