Myrtle McAteer was an American tennis player around the turn of the 20th Century.

At the U.S. National Championships (now known as the U.S. Open

U.S. Open (tennis)

The US Open, formally the United States Open Tennis Championships, is a hardcourt tennis tournament which is the modern iteration of one of the oldest tennis championships in the world, the U.S. National Championship, which for men's singles was first contested in 1881...

), McAteer won the singles title in 1900, and doubles titles in 1899 and 1901. She also was a singles finalist in 1901, a doubles finalist in 1900, and a mixed doubles finalist in 1901.

She was also the first singles champion of the storied event in Cincinnati

Cincinnati Masters

The Cincinnati Open is an annual outdoor hardcourts tennis event held in the Cincinnati suburb of Mason, Ohio, USA. The event started on September 18, 1899 and is the oldest tennis tournament in the United States played in its original city., Between...

. She knocked off future International Tennis Hall of Famer Juliette Atkinson

Juliette Atkinson

Juliette Paxton Atkinson was an American female tennis player. She was born in Rahway, New Jersey, United States....

in the singles final in 1899 to take the title. In all, she reached 10 finals in Cincinnati, and in addition to her singles title in 1899 she won singles titles in 1900 and 1904, and doubles titles in 1899, 1900, 1904 & 1905. Her other finalist appearances came in singles in 1903 and 1905, and in doubles in 1903.

At the U.S. Clay Court championships in 1915, she was a singles quarterfinalist and a mixed doubles semifinalist.

She died in Los Angeles, California in 1952.