Sorpresa nei quarti di finale del torneo di Cincinnati. Il futuro numero uno mondiale Rafael Nadal (ATP 2) è stato estromesso da Nick Kyrgios (23) in due set quasi senza storia, con il risultato di 6-2 7-5. L'australiano disputerà la sua terza semifinale a un Masters 1000, dopo le due di Miami quest'anno e l'anno scorso, contro l'altro spagnolo David Ferrer (31).
Ad inizio partita Kyrgios si è preso tutti i rischi possibili, in particolare alla risposta, riuscendo così a rubare a due riprese il servizio all'avversario, portandosi in 10' sul 4-0 e chiudendo il set in 25'. Più equilibrata la seconda frazione, con Nadal che ha recuperato un gioco di svantaggio per riportarsi sul 5-5. A quel punto l'australiano si è però immediatamente ripreso il break, per poi chiudere la partita con un ace nel gioco successivo.
Per il maiorchino si tratta del 34o torneo giocato sul duro senza sollevare un trofeo. Il suo ultimo trionfo su questa superficie risale al torneo di Doha del 2014.
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