How many Grand Slam singles championships were won by the winner of the 1974 Virginia Slims of Newport?
1974 Virginia Slims of Newport: The 1974 Virginia Slims of Newport, was a women's tennis tournament played on outdoor grass courts at the Newport Casino in Newport, Rhode Island in the United States that was part of the 1974 Virginia Slims World Championship Series. 1974 Virginia Slims of Newport:  First-seeded Chris Evert won the singles title and earned $4,500 first-prize money. Chris Evert: Christine Marie Evert (born December 21, 1954), known as Chris Evert Lloyd from 1979 to 1987, is a former World No. 1 professional tennis player from the United States. Chris Evert:  She won 18 Grand Slam singles championships and three doubles titles.
i don't know