Margaret Osborne Dupont is often a forgotten champion, but she shouldn't be.
A 6 time singles grand slam winner, she won the singles, doubles and mixed of the "Big Three" slams. DuPont never got around to playing in Australia, largely because her husband Will DuPont wouldn't allow it.
She stands 4th on the all-time slam list (36 slams)
even without ever entering the Aussie and play being limited only to the US from 1940-45
She holds the record for most consecutive US doubles titles (10) wining in 1941 with Palfrey and 42-50 with Brough.
With her good friend and doubles partner Louise Brough she was one half of perhaps the greatest doubles team in history. From 1942 to 1950 they were undefeated in winning 9 consecutive US doubles titles. Their 51 match streak was snapped in the 51 finals by Fry and Hart, who saved match points.
Speaking of match points, DuPont won two majors from the brink of defeat, saving match points in the 46 French final vs. Betz and the 48 US final vs. Brough. The 1948 encounter remains the longest ever 3 US women's final in games (4-6 6-4 15-13-48 games in all).
Her career spanned 4 decades, starting in 1935 and lasting to 1962. Her peak was 1946-50, winning a slam every year. After the birth of her son Will Jr. (Billy) in the early 50s she played sporadically.
She won slams 3 decades, the first in 1941-and the last in 1960 in taking the US mixed, a spam of 19 years between first and last slams.
Dupont was known for her heady play.