Chris Evert - US Open 1971
Chris Evert made her Grand Slam debut at the 1971 US Open, where she lost to Billie Jean King in the semifinals. Evert was 16 years old at the time, making her the youngest semifinalist in US Open history.
You may notice the Open was played on grass at the time of these photographs. Per u/81Ranger, the U.S. Opem was played on grass from 1881-1974. The poor conditions of the grass, particularly at the end of the tournament, resulted in a switch. Next, the US Open was played on clay from 1975-1977. This was a green clay known as Har Tru that is still often seen in the south. From 1978 onward it moved to Flushing Meadows and the hard courts it's become known for.
While playing a match at the 1978 US Open, a diamond line bracelet Evert was wearing, given to her by Connors, fell from her wrist to the surface of the court. She said about this, "I dropped my tennis bracelet", and since then diamond line bracelets have also been called "tennis bracelets".
