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Top coaches under 30 rocking WTA tour - Roland-Garros - The 2020 Roland-Garros Tournament official site
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Sandra Zaniewska, coach of Petra Martic, in action during her quarter-final match at the 2019 Roland Garros Grand Slam tennis tournament Stock Photo - Alamy
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Martic's journey from tears to triumph - Roland-Garros - The 2020 Roland-Garros Tournament official site
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Wimbledon 2019: 'She helped me find my identity' - Martic on partnership of equals with coach Zaniewska
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