Anastasia Potapova
Anastasia Sergeyevna Potapova( born 30 March 2001) is a Russian tennis player.
Potapova is a former junior No. 1, as well as the 2016 Wimbledon Championships girls' singles champion, where she defeated Dayana Yastremska from Ukraine in the final.
Potapova debuted in a Grand Slam tournament as a wildcard entry in the qualifying draw of the 2017 Wimbledon Championships defeating Elizaveta Kulichkova to qualify for the main draw.
2019 Internationaux de Strasbourg – Singles
Anastasia Pavlyuchenkova was the defending champion, but withdrew before the tournament began.
Dayana Yastremska won the title, defeating Caroline Garcia in the final, 6 – 4, 5 – 7, 7 – 6.
2019 Torneo Internazionale Femminile Antico Tiro a Volo – Singles
Dayana Yastremska was the defending champion, but chose to participate in Nottingham instead.
Sara Errani won the title, defeating Barbara Haas in the final, 6 – 1, 6 – 4.
2016 Wimbledon Championships – Girls' Singles
Sofya Zhuk was the defending champion, but chose not to participate this year.
Anastasia Potapova won the title, defeating Dayana Yastremska in the final, 6 – 4, 6–3.
2017 Neva Cup – Singles
Natalia Vikhlyantseva was the defending champion, but chose not to participate.
Belinda Bencic won the title, defeating Dayana Yastremska in the final, 6 – 2, 6–3.
2016 Australian Open – Girls' Doubles
Miriam Kolodziejová and Markéta Vondroušová were the defending champions, however Kolodziejová was no longer eligible to play juniors and Vondroušová chose not to participate.
Anna Kalinskaya and Tereza Mihalíková won the title, defeating Dayana Yastremska and Anastasia Zarytska in the final, 6 – 1, 6–1.
Émile Scaremberg
Émile Scaremberg( 26 April 1863 – 26 February 1938) was a French tenor.
Dayana Yastremska
Dayana Oleksandrívna Yastremska( born 15 May 2000) is a Ukrainian professional tennis player.
She has a career- high WTA singles ranking of 22, achieved on 4 November 2019, and a best doubles ranking of 84, first reached on 14 October 2019.
She has won three singles titles on the WTA Tour, as well as three singles and three doubles titles on the ITF Women's Circuit.
Yana Sizikova
Yana Dmitriyevna Sizikova( born 12 November 1994) is a Russian tennis player.
She has a career- high WTA singles ranking of No. 336, achieved on 20 June 2016.
On 28 May 2018, she peaked at No. 102 of the doubles rankings.
Sizikova made her WTA main- draw debut at the 2018 St. Petersburg Ladies' Trophy in the doubles draw, partnering Dayana Yastremska.
2017 Ladies Open Dunakeszi – Singles
This was the first edition of the tournament.
Dayana Yastremska won the title after defeating Katarina Zavatska 6 – 0, 6 – 1 in the final.

Question: Do Dayana Yastremska and Émile Scaremberg have the same nationality?
Answer: no