Jelena Ostapenko takes on Ana Konjuh in a teenage quarterfinal battle on the fourth day of the J&T Banka Prague Open.

CENTRE COURT

Starts 11am CET

Camila GIORGI (ITA) vs [Q] Mona BARTHEL (GER)

Barbora STRYCOVA (CZE) [3] vs Katerina SINIAKOVA (CZE) [8]

Kristyna PLISKOVA (CZE) vs [Q] Beatriz HADDAD MAIA (BRA)

Ana KONJUH (CRO) [7] vs Jelena OSTAPENKO (LAT)

COURT 1

Starts 11am CET

Asia MUHAMMAD (USA) / Alicja ROSOLSKA (POL) [4] vs Anna-Lena GROENEFELD (GER) / Kveta PESCHKE (CZE) [2]

Not before 2pm

Lucie HRADECKA (CZE) / Katerina SINIAKOVA (CZE) [1] vs Raquel ATAWO (USA) / Renata VORACOVA (CZE) [3]