World number one Aryna Sabalenka overpowered Lucia Bronzetti 6-1, 6-2 to lead a string of top women's seeds into the last 16 at Indian Wells on Monday.World number three Coco Gauff cleaned up her service act to pull off a 7-6 (7/1), 6-2 victory over Greece's Maria Sakkari — who beat Gauff in the semi-finals last year on the way to a second Indian Wells final in three years.