Table: tennis_matches_2
Columns: outcome
date
tournament
surface
partner
opponents
score

Question: Marty Riessen played as a partner during a match with what kind of surface?
SQL: SELECT "surface" FROM tennis_matches_2 WHERE "partner" = 'marty riessen'

Question: When did Marty Riessen team up with a partner during a match on a carpet surface?
SQL: SELECT "date" FROM tennis_matches_2 WHERE "surface" = 'carpet' AND "partner" = 'marty riessen'