Serena Williams was playing for her first trip to the Dubai final—and a 25th meeting with older sister Venus. World No. 26 Alize Cornet played the role of party crasher with exuberance, stunning the tight top seed 6-4, 6-4, to reach her first career hard-court final.
Winless in three prior meetings with Williams, Cornet served 71 percent, maintained consistent depth on her groundstrokes, faced only one break point and produced a five-game run midway through the opening set to take charge.
"Definitely the biggest win of my career," Cornet told TennisTV.com's Annabel Croft afterward. "I played a very good match. I was so into the match I didn't even realize it when I won."
The 24-year-old Nice native will face 44th-ranked wild card Venus Williams in the final.
In a battle of former world No. 1 players, two-time champion Venus crushed Caroline Wozniacki, 6-3, 6-2, to score her 14th straight win in Dubai. Venus has won all three prior meetings with Cornet, including a 6-3, 6-3 victory at the 2013 Australian Open.
The world No. 1, who lost just four matches last season, suffered her second loss of the season. It was Serena's first defeat to a woman ranked outside of the Top 25 since she suffered a stunning Roland Garros opening-round loss to 111th-ranked Frenchwoman Virginie Razzano in 2012.
Playing her first tournament since a back injury sidelined her following her Australian Open fourth-round loss to Ana Ivanovic, Williams contributed to her demise committing more than three times as many errors (35 to 11) as Cornet.
Typically an explosive server, Williams won just 9 of 24 points played on her second serve and was broken three times. Cornet broke for a 5-4 lead in the first set. Serving for the opening set, the 26th-ranked French woman reached set point when Williams missed a return. Cornet ended a long rally drilling a backhand winner down the line, skipping to her court-side seat with a clenched fist and one-set lead.