Table: ignatik_match_stats
Columns: outcome
tournament
surface
partner
opponents
score

Question: What surface was the città di caltanissetta played on?
SQL: SELECT "surface" FROM ignatik_match_stats WHERE "tournament" = 'città di caltanissetta'

Question: What was the score in Volkswagen Challenger tournament?
SQL: SELECT "score" FROM ignatik_match_stats WHERE "tournament" = 'volkswagen challenger'