Julie Vlasto
| Full name | Pénélope Julie Vlasto Serpieri | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Country (sports) | France | ||||||||
| Born | 8 August 1903 Marseille, France  | ||||||||
| Died | 2 March 1985 (aged 81) Lausanne, Switzerland  | ||||||||
| Plays | Right-handed (one-handed backhand) | ||||||||
| Singles | |||||||||
| Highest ranking | No. 8 (1923) | ||||||||
| Grand Slam singles results | |||||||||
| French Open | SF (1925) | ||||||||
| Wimbledon | SF (1926) | ||||||||
| Doubles | |||||||||
| Grand Slam doubles results | |||||||||
| French Open | W (1925, 1926) | ||||||||
| Grand Slam mixed doubles results | |||||||||
| French Open | F (1925) | ||||||||
Medal record 
  | |||||||||
Pénélope Julie "Diddie" Vlasto Serpieri (French pronunciation: [ʒyli vlastɔ]; 8 August 1903 – 2 March 1985) was a female tennis player from France. She won the silver medal at the Paris Olympics in 1924 in women's singles, losing the final to the American Helen Wills Moody. Vlasto also won the version of the French national championships in 1924 that was open only to French nationals. She was a doubles partner of Suzanne Lenglen in many women's doubles tournaments during the early 1920s.
She was born as Pénélope Julie Vlasto on 8 August 1903, in Marseille, France.
According to Wallis Myers of the Daily Telegraph and Daily Mail, Vlasto was ranked in the world top ten in 1923 and 1926, reaching a career high of world No. 8 in 1923.
She married Jean-Baptiste Serpieri on 17 February 1927.