The Indo-Swiss pair posted a comfortable 6-4 6-2 victory over the Chan sisters and went in on a monster 20-match winning streak.
Sania and Martina's last loss was against the Taiwanese sisters in the semifinals at Cincinnati. But since then the top seeded combination had beaten them three times and kept that pattern going this time as well.
Today's tie saw the third seeded Taiwanese pair take an early lead, going 3-1 up in the first set but Sania and Martina reeled off 11 of the next 14 games to completely crush their opponents and run away with the match.
"When I get myself down, I'm not really a morning person, so she was out there and kept fighting and kept keeping me up there. That's why we were able to come back in the first set. Once I felt better, that's when everything started to click. They're a great team, so they've always come out strong in the past six matches that we played them. And they know how to play against us."
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Sania said that she and Martina had a particular strategy against the Chan sisters.
"We kind of have to stick to our guns, stick to what we have planned. We have to trust our abilities. That's what really takes us through a lot of the times, is that trust in each other's ability. We know sooner or later we're going to break. It happened at 3-2. If it didn't happen there, we would still keep fighting to make it happen."
Sania and Martina have won eight titles together this year -- Indian Wells, Miami, Charleston, Wimbledon, US Open, Guangzhou, Wuhan and Beijing.
Martina is just a win away from her 50th WTA doubles title, a milestone that only 15 players have reached so far.