Sabalenka, 27, became the fifth woman to win Indian Wells and Miami titles in one year.
He said 35 other countries are ready to join the boycott for “fair sport” but did not name them.
Svitolina will next face world number one Iga Swiatek for a place in the semi-finals.
The thrilling final match between two of the most exciting power hitters in the women’s game ended 4-6 6-3 6-4.
The German Olympic Sports Confederation (DOSB) is calling for an extension of the sanctions on Russia and Belarus.
In addition, the Japanese government on Thursday froze the assets of 18 additional Russian officials and seven high-ranking Belarusian officials.
Thousands of people, from members of parliament’s worldwide to former winners, are eligible to propose candidates.
A 25-year-old Iraqi Gashtjar said “there are still 900 to 1,000 of us, including many children.”
