Wimbledon Champion Garbine Muguruza made short work of qualifier Beatriz Haddad Maia at the Cincinnati Masters on Tuesday, winning 6-2, 6-0, to advance to the Round of 16.
The 23-year-old fourth seed reeled off 10 consecutive games against the Brazilian to wrap up an easy win.
Muguruza now awaits the winner of the second round match between 16th seed Madison Keys and Russia’s Daria Kasatkina.
Earlier in the day, second-seed Simona Halep and seventh-seed Johanna Konta became the first players to reach the third round.
Halep defeated American qualifier Taylor Townsend 6-4, 6-1, while Wimbledon semi-finalist Konta beat Kiki Bertens of the Netherlands 6-3, 6-3.
Venus Williams breezed into the second round with a simple win over compatriot Alison Riske 6-2, 6-0 in just 66 minutes. Williams will play Australia’s Ash Barty, who beat fellow qualifier Varvara Lepchenko 6-4, 6-4.
"I hadn't played in a while, so I wasn't really sure what to expect," said Williams, who lost in the round of 16 at last week’s Rogers Cup.
"I know she likes a flat ball and is a retriever and is just feisty, and the courts are really slow, too. Today was like about being measured and being patient and trying to just capitalise on the match."
Another qualifier, Aleksandra Krunic, pulled off a surprise 6-4, 6-2 win over 12th-seed and Roland Garros champion Jelena Ostapenko, while Poland’s Agnieszka Radwanska (10) was knocked out by unseeded German Julia Goerges 6-4, 6-4.