Sabalenka and Gauff reach quarters in Miami

World No 1 Aryna Sabalenka stormed into the quarter-finals of the Miami Open as she swept aside Zheng Qinwen in straight sets on Monday. 

Sabalenka beat her Chinese opponent 6-3 6-4 to set up a clash with Hailey Baptiste, who knocked out Jeļena Ostapenko on Sunday.