Initially around 150 participated in Riga Open Tournament, in 2009 the number increased up to 300. In 2010 there where already 324 participants. In 2012 there were already 377 participants from 26 countries.

Players from all around the World are presented in this Tournament  -Austria, Azerbadjan,  Brazil, Belarus, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Great Britain, Georgia, Germany, Israel, Italy, Latvia, Lithuania, Luxembourg, Moldova, Netherland, Norway, Poland, Portugal, Russia, Serbia, Slovenia, Spain, Sweden, Ukraine, USA;

During the years of the Tournament, the participants of the Tournament have been the players which are now the key players of the Latvian national team – Jeļena Ostapenko, Anastasia Sevastova, Irina Kuzmina, Alise Vaidere, Ernests Gulbis, Andis Juska and others,  as well the players which have become the stars of the tennis at international level – Dinara Safina, Anna Chakvetadze, Alisa Kleybanova, Vera Dushevina, Iga Swiatek, Holger Rhune.