Yes, that match with Seles haunted Capriati for ages.
Beige, while Althea winning Wimbledon was a milestone, I actually think her first US Open match was more important. The USTA refued Althea's entries based on lack of results, a tortured logic since she couldn't break the color bar. A letter in 1950 by a former respected champ Alice Marble shamed the USTA into letting Althea enter. She drew top player Louise Brough and lost, but she took Louise to 3 sets. The match was interrupted by a huge storm where a thunderbolt hit and shattered a huge eagle atop the stadium. Some saw that as a sign.
It took Althea 7 more years to get a major title, but without breaking the barrier to begin with in 1950 she would have never made it.
Another huge match was Lenglen-Chambers in 1919. A world war had turned Europe upside down, and the 40 something Chambers was a respectable 7 time champ who still wore long sleeves and ankle length dresses. Her young opponent was a shocking (by 1919 standards) French girl who sipped brandy on changeovers and displayed her arms and legs. Some proper English women in 1919 walked out on her matches hissing "French hussy". Men became eager to see her.
An overflow crowd on finals day came out. Chambers was defending English honor vs. an invader, the contest had old vs. young, and even the King and Queen were there.
The battle of generations was a glory, going 3 long sets. Chambers twice had match point, and Suzanne saved one when she mishit an overhead off the wood and it just cleared the net.
Chambers hit a drop shot on another which hit the tape, bounced up, and landed on her side.
The women left court to a standing ovation. When invited to appear before the royals, both had to refuse, being unable to walk on blistered and bloody feet. Suzanne went on to become a symbol of the new woman of the 1920s, so popular that Wimbledon moved to it's new(and present) facility in 1923 largely due to her.
I'd pick the 1981 US Open as another historic event. Martina Navratilova lost in the finals, but got huge crowd support from an audience that knew she was gay. Her exciting brand of tennis was what mattered, not her sexuality. We know that now, but in 1981 many sponsors were afraid to support women's tennis because of the "lesbian thing" as some called it.