(CNN) -- Serena Williams evened her head to head record with elder sister Venus at 10 wins apiece as she reached the final of the WTA tournament at Key Biscayne in Florida.
Serena celebrates the moment of victory against her elder sister Venus.
The three-set 6-4 3-6 6-3 victory also assures Serena of keeping the world number one spot ahead of Russian Dinara Safina.
She will face Victoria Azareka of Belarus for a record sixth title in Miami on Saturday, but had family pride at stake in a late night clash against Venus.
"I definitely knew about it," Serena told the WTA Tour official Web site www.sonyericssonwtatour.com.
"It's definitely good to even it up. I would love to be in the lead again."
She added: "I was also thinking I'd love to remain No.1, so obviously I'm really excited about that. I think I was more happy about that than winning the match at the end. I'm really happy to get over this one."
After the opening two sets were shared, Serena raced to a 4-1 lead in the decider and broke Venus again in the final game to seal victory.
She will be facing Azarenka for the second time this year, the previous encounter at the Australian Open seeing her opponent pull out with a stomach ailment while leading 6-3 2-4.
Serena went on to take her 10th grand slam title, but will be wary of Azarenka's growing confidence.
The 19-year-old had earlier kept her nerve to see off eighth seed Svetlana Kuznetsova in a hard-fought three-setter lasting two hours 40 minutes in blazing temperatures.
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