US Open 2015: Stan Wawrinka through to last eight in New York

By BBC News

Fifth seed Stan Wawrinka beat American Donald Young to set up a possible US Open quarter-final against Andy Murray.

The French Open champion from Switzerland, 30, won 6-1 1-6 6-3 6-4 on Arthur Ashe Stadium.

Women's second seed Simona Halep, 23, came from a set down to beat Sabine Lisicki 6-7 (6-8) 7-5 6-2.

Murray faces South African Kevin Anderson later on Monday, while fellow Briton Johanna Konta meets Petra Kvitova in the women's fourth round.

Swiss second seed Roger Federer takes on American John Isner in the second match of the night session after Konta-Kvitova.

Embarrassed Azarenka

There was much bemusement around Flushing Meadows when former finalist Victoria Azarenka, 26, stepped out on to Arthur Ashe Stadium wearing bandages on her biceps.

They did not appear to hinder the 20th seed, who celebrated her 6-3 6-4 win over American Lepchenko with an on-court dance afterwards.

She also revealed the reason for the patches, saying: "I got a blister from rubbing against my shirt. It's a little embarrassing."

The Belarusian, twice a beaten finalist at Flushing Meadows, will now meet Halep for a place in the last four.

Venus Williams ready to end Serena's Grand Slam

Venus Williams is prepared to end her sister's attempt at a first calendar Grand Slam when she meets Serena in the US Open quarter-finals.

The sisters will play each other for the 27th time when they open the night session at 00:00 BST on Wednesday.

Serena, 33, has not lost a Grand Slam match since Wimbledon 2014 and hopes to win the first calendar Slam since 1988.

"No-one is out to be a spoiler, but at the same time you're focused on winning your match," said Venus, 35.

But she added: "I think people love to see history being made."