Final answer:
Billie Jean King won the Wimbledon Championships in 1975, marking her sixth singles title and tying the record for most titles won in the Open Era.
Step-by-step explanation:
Tennis Tournament Won by Billie Jean King in 1975:
In 1975, Billie Jean King won the Wimbledon Championships, one of the most prestigious tennis tournaments in the world. This tournament is held annually in London, England, on grass courts.
Importance of Billie Jean King's Victory:
Billie Jean King's victory at Wimbledon in 1975 was significant because it marked her sixth singles title at the tournament, tying her with Suzanne Lenglen for the most titles won in the Open Era. This achievement solidified King's status as one of the greatest tennis players of all time.