Watson through to last eight
Heather Watson reached the quarter-finals of the US National Indoor Tennis Championships with a 2-6 6-0 6-3 win over Andrea Hlavackova.
The British number one will face Stefanie Voegele in the next stage after she won the first match on court, seeing off Claire Feuerstein 3-6 7-6(2) 6-1.
There was a shock elswhere as second seed Sofia Arvidsson was bundled out in the second round by New Zealander Marina Erakovic, who was a 6-1 3-6 6-3 winner.
There was no such problem for top seed Kirsten Flipkens, though she was taken to three sets in a 7-5 3-6 6-3 victory over Lesia Tsurenko.
Sabine Lisicki and Kristina Mladenovic - seeded three and eight respectively - also reached the third round.
Lisicki defeated Melinda Czink 7-6(0) 4-6 6-2 and Mladenovic despatched Victoria Duval 6-1 3-6 6-3.