(CNN) -- Serena and Venus Williams will meet for the 19th time in a competitive tournament after claiming staight sets victories in the quarterfinals of the Dubai Open on Thursday.
Serena is tied at 9-9 with older sister Venus in their career head-to-head meetings.
Top seed and world number one Serena fought back from going down 2-4 in the second set to beat French Open champion Ana Ivanovic 6-4 6-4.
Meanwhile, Wimbledon champion Venus, who is seeded six here, crushed in-form fourth seed Elena Dementieva -- the defending champion -- 6-3 6-3.
"Obviously Elena has been playing great this year and she has the game to control the match," Venus told the tournament's official Web site.
"That's how she likes to play and that's how I like to play so I'm pleased that I was able to control the match. I would have liked to have broken serve a little more, but I was able to keep the pressure on. That's the most important thing."
Their head-to-head stands at nine wins each, with Venus having won their last encounter, on a similar surface in Doha in November, before going to win the WTA Championships, the tour's end-of-year event. Watch Venus Williams in Doha »
Meanwhile, the day's biggest surprise saw France's Virginie Razzano, the world number 58, claim one of the best wins of her career with a 7-6 7-5 victory over Russian fifth seed Vera Zvonareva.
Razzano will now play 16th-seeded Estonian Kaia Kanepi, who beat Russian Elena Vesnina 6-3 7-5 in the other quarterfinal, for a place in this weekend's final.