Angelique Kerber was all business on Friday as she thrashed Catherine Bellis 6-1, 6-1 to march into the fourth round of the US Open in less than an hour.
Kerber, who has a chance to overtake Serena Williams as the world number one, will be looking to add to her success this season, in which she claimed her maiden grand slam title at the Australian Open and won a silver medal at the Olympics in Rio de Janeiro.
The German looked at her best right from the get-go as she proved too much for Bellis to handle and broke the American twice on her way to winning the first set in 30 minutes.
Kerber was even more dominant in the second set as she broke Bellis three times in the first five games before Bellis broke back in the sixth game. That was to be Bellis’ only bright moment in the match as Kerber broke her in the seventh game to wrap up her victory in 55 minutes.
The world number two will take on Petra Kvitova in the fourth round after the 14th seed beat 22nd seed Elina Svitolina 6-3, 6-4.
Earlier in the day, eighth seed Madison Keys found herself trailing 5-1 in the third and deciding set before producing an extraordinary comeback against Naomi Osaka to beat her 7-5, 4-6, 7-6 (3).
Seventh seed Roberta Vinci and 13th seed Johanna Konta also made it through, but 12th seed Dominika Cibulkova suffered a shock 6-3, 3-6, 4-6 loss to Lesia Tsurenko.