Swiss teenage qualifier Timea Bacsinszky beat third seed Daniela Hantuchova 6-2 4-6 4-1 as the Slovakian retired due to what seemed to be breathing problems at the Proximus Diamond Games, in Antwerp, Belgium.
During the quarterfinal, Hantuchova was seen several times by a doctor and appeared to be having breathing difficulties. When the world No.8 decided to retire she enabled the 18-year-old Bacsinszky to score her first victory over a top 10 player.
Bacsinszky will be playing in her first career WTA semifinal when she faces the winner of the Henin-Kleybanova match.
This has been the second upset of Antwerp quarterfinals, as fourth-seeded Patty Schnyder fell to unseeded Karin Knapp of Italy earlier in the day.
