user: Question: What is the round when the match was against Sergis Kyratzis?
Columns: ['Edition', 'Round', 'Date', 'Against', 'Surface', 'Opponent', 'Result']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['2003 Davis Cup Europe/Africa Group II', 'QF', '11–13 July 2003', 'South Africa', 'Hard', 'Wesley Moodie', '6–2, 1–6, 2–6']
SQL:

assistant: SELECT "Round" FROM "Table" WHERE "Opponent" = 'Sergis Kyratzis';