Heather Watson and Naomi Broady are through to the quarter-finals of the Luxembourg Open after victory over Anett Kontaveit and Sabine Lisicki respectively.
Watson beat Kontaveit, ranked number 35 in the world, 6-4 6-4 to set-up a match with fifth-seed Elise Mertens.
The British No 2 took the first set in 35 minutes, clinching it with an impressive forehand winner. Watson carried her momentum through to the second set as she broke third-seed Kontaveit to take a commanding lead.
Kontaveit broke back to level the scores at 3-3 before Watson immediately returned the favour. Watson then served out the match taking victory in one hour and 23 minutes.
Britain's Naomi Broady saved two match points and won 10 of the last 13 games beating Sabine Lisicki to join Watson in the last eight.
Top seed Kristina Mladenovic lost a 10th match in a row at the Kremlin Cup.
The Frenchwoman was one of the stand-out players of the first half of the season but has slumped spectacularly during the final months of the campaign.
Mladenovic has failed to win a match since a first-round victory over Tatjana Maria in Washington on July 31, with her latest loss a 6-2 2-6 6-2 defeat by Aliaksandra Sasnovich in Moscow.
It was a dreadful day for the favourites, with the top four seeds all going out.
Second seed Coco Vandeweghe lost 7-5 1-6 6-2 to Lesia Tsurenko, number three Elena Vesnina was beaten 7-6 (7/3) 6-4 by Natalia Vikhlyantseva and Irina-Camelia Begu beat fourth seed Anastasija Sevastova 6-4 6-3.
Magdalena Rybarikova defeated Maria Sharapova in the first round but only lasted a set of her second-round clash with Alize Cornet before retiring injured, while sixth seed Daria Gavrilova also pulled out.
Sky Sports will have all the action from the Erste Bank Open and Swiss Indoors Basel before the Paris Masters.
The Next Gen ATP Finals in Milan and season-ending extravaganza World Tour Finals at London's O2 in November end another memorable year which will be covered via our website www.skysports.com/tennis with live blogs and updates as the season reaches its climax.
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