Aryna Sabalenka won a power battle against Jelena Ostapenko to set up a fourth-round rematch with Naomi Osaka. Sabalenka and Osaka first met at the US Open in 2018, with the Japanese star going on to win her maiden grand slam title, but had not faced each other again until Indian Wells this spring. Remarkably, this will be their fourth meeting in as many months, all in the last 16, with Sabalenka also beating Osaka in Madrid and at the French Open.