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The Czech’s root…

Marketa Vondrousova is in the footsteps of the great Czech Grand Slam players. She reached her first semifinal at her 9⃣th Grand Slam.
How many Slams needed for the Czech women players to reach a SF?
Martina Navratilova – Hana Mandlikova 7⃣
Petra Kvitova – Marketa Vondrousova 9⃣
Helena Sukova 1⃣3⃣
Jana Novotna 1⃣5⃣
Karolina Pliskova 1⃣8⃣