user: Question: What is the name of the opponent when Anastasia Pivovarova was the partner?
Columns: ['Outcome', 'Date', 'Tournament', 'Surface', 'Partner', 'Opponents', 'Score']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Runner–up', '28 May 2006', 'Budapest', 'Clay', 'Georgie Stoop', 'Antonia Xenia Tout Nataša Zorić', '1-6 2-6']
SQL:

assistant: SELECT "Opponents" FROM "Table" WHERE "Partner" = 'Anastasia Pivovarova';