Table schema:
CREATE TABLE table_1918850_2 (championship VARCHAR, opponents_in_the_final VARCHAR, partner VARCHAR, outcome VARCHAR, surface VARCHAR)

Question: which championship had helena suková tom nijssen as opponents in the final and nicole provis as partner, the surface was hard and the outcome was winner
SQL: SELECT championship FROM table_1918850_2 WHERE outcome = "Winner" AND surface = "Hard" AND partner = "Nicole Provis" AND opponents_in_the_final = "Helena Suková Tom Nijssen"