Table: prodon_match
Columns: date
tournament
surface
opponent
score

Question: What date was the match against leonardo tavares with a score of 6–4, 6–4?
SQL: SELECT "date" FROM prodon_match WHERE "score" = '6–4, 6–4' AND "opponent" = 'leonardo tavares'

Question: What date was the match against adrián menéndez-maceiras?
SQL: SELECT "date" FROM prodon_match WHERE "opponent" = 'adrián menéndez-maceiras'