Table: mark_keil_tennis_match_2
Columns: date
tournament
surface
partner
opponents_in_the_final
score

Question: What was the score when Mark parterned with lorenzo manta?
SQL: SELECT "score" FROM mark_keil_tennis_match_2 WHERE "partner" = 'lorenzo manta'

Question: Who was his partner when he played on carpet?
SQL: SELECT "partner" FROM mark_keil_tennis_match_2 WHERE "surface" = 'carpet'

Question: When did he play with peter nyborg?
SQL: SELECT "date" FROM mark_keil_tennis_match_2 WHERE "partner" = 'peter nyborg'

Question: What day did he play on hard with tom mercer?
SQL: SELECT "date" FROM mark_keil_tennis_match_2 WHERE "surface" = 'hard' AND "partner" = 'tom mercer'