Serena Williams of the USA hits to Ekaterina Makarova of Russia on day two of the 2016 US Open tennis tournament at USTA Billie Jean King National Tennis Center, Aug 30, 2016. [Photo/Agencies]

NEW YORK - Top seeded Serena Williams swept past unseeded Russian Ekaterina Makarova 6-3, 6-3 in the first round of the US Open here on Tuesday.

Williams enjoyed the 63-minute victory by hitting 12 aces, with only one double-fault. "I got off to a fast start, and I didn't want to start out slow. That's all I could do today," said Williams, who played just three singles matches since the Wimbledon because of a sore right shoulder.

"I'm going to have to wait until tomorrow to see. I haven't been able to play much since Wimbledon, so every day I'll just see how it goes," Williams added.