Fourth seed Daniela Hantuchova was dumped out of the BGL Luxembourg Open by unseeded Israeli Shahar Peer on Friday.
The Slovakian succumbed in straight sets 6-2 7-6 to Peer, who will now take on sixth seed Sabine Lisicki after the world number 28 from Germany put out Patty Schnyder of Switzerland 6-4 6-2.
Fifth seed Yanina Wickmayer will be the favourite in the other semi-final after booking her place with a 7-6 4-6 6-1 victory over fellow Belgian Kirsten Flipkens.
Wickmayer will now take on Swiss Timea Bacsinszky who overcame Katerina Srebotnik of Slovenia 6-7 6-1 6-4.
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