"I'm pretty pumped to get through", added Venus, playing in her 80th Grand Slam event.
Six-time champion Serena eased into the third round encounter with a 6-2, 6-2 win over German world number 101 Carina Witthoeft on the back of 30 winners and 13 aces.
Venus, ranked 16th, advanced to Friday's third round matchup by defeating Camila Giorgi 6-4, 7-5 earlier on Wednesday.
You can catch her in action in a Round of 32 match on Friday where she will meet her sister, Venus Williams, in an all-Williams showdown.
This is the tennis champion's second look from the highly anticipated collaboration between the two brands, and comes at an especially poignant time: following the "catsuit ban" by French Tennis Federation president Bernard Giudicelli, who said to Tennis magazine of Williams' French Open outfit, "It will no longer be accepted".
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Also into the last 32 is Elina Svitolina (7) of Ukraine after a 6-3, 6-2 win over Germany's Tatjana Maria.
Asked about the possibility of a match-up against her sister, Venus said it was a tough draw. "When she beats me, she always roots for me as well". It's not the end of the world.
But 20 years since the sisters' first collision course in the Australian Open, which Venus won 7-6 (7-4), 6-1, another chapter awaits Friday. Her entry, meanwhile, means that all of the previous titleholders in the five-year-old tournament will be present, with two-time victor Petra Kvitova and defending champion Caroline Garcia also playing. "But I just found a way today, and sometimes it's not going to be the best, but you've just got to battle through".
"If I would say my true feelings, it would be bleeped out, because it was ridiculous".
"I think it's very fair from them to apologize to me".