Roger Federer
Roger Federer of Switzerland waves after being defeated by Tomas Berdych of the Czech Republic in their men's quarter-final match at the US Open tennis tournament in New York, September 5, 2012. Reuters

The 2012 US Open enters its eleventh day shorn of two of the star draws in the men's singles event, after sixth seed Czech Tomas Berdych and seventh seed Argentinean Juan Martin del Potro sent world number one Roger Federer and tournament homeboy Andy Roddick, the 20th seed, home from Flushing Meadows.

Day Ten Round-Up:

Men's singles:The biggest upset of the day was Berdych's 7-6(1), 6-4, 3-6, 6-3 win over the 2012 Wimbledon champion and top seed Roger Federer. Close behind that was Roddick's four set defeat to del Potro; he lost 7-6(1), 6(4)-7, 2-6, 4-6.

However, there is some consolation for the organisers, as second seed and defending champion Novak Djokovic and third seed Andy Murray of Great Britain both progressed to the next rounds. The Serbian beat Switzerland's Stanislas Wawrinka, the 18th seed, 6-4, 6-1, 3-1 (ret), while Murray, the London Olympics 2012 gold medalist, marched past 12th seed Marin Cilic of Croatia, 3-6, 6(4)-7, 6-2, 6-0 to enter the semi final, where he will now play Berdych - Federer's conqueror.

Eighth seed Janko Tipsarevic was also in action, in a fourth round match, against 19th seed Philipp Kohlschreiber of Germany; the Serb won 6-3, 7-6(5), 6-2 to enter the quarter final.

Maria Sharapova

Women's Singles: Meanwhile, the women's third seed and former world number one Maria Sharapova of Russia fought back from rain interruptions and a 0-4 first set deficit to record a 3-6, 6-3, 6-4 win over 11th seed Marion Bartoli of France, to enter the semi finals. Women's singles gold medalist at the London Olympics 2012, Serena Williams of the US, continued her imperious march, thumping 12th seed Ana Ivanovic of Serbia, 6-1, 6-3. Also through was 10th seed Sara Errani of Italy, who beat compatriot and 20th seed Roberta Vinci 6-2, 6-4.

Day 11 Preview (All Times BST):

Quarter finals (men's singles):

Tipsarevic is to play fourth seed David Ferrer of Spain in the first of two remaining men's quarter finals. The match is not expected to start before 6.30 pm and will be played in the Arthur Ashe Stadium. The Spaniard is, statistically, the favourite and does have a better head-to-head record (Ferrer has won two of the three games played), the Serbian will bank on the fact he won the last time out (at the London Olympics 2012).

The second men's singles quarter final of the day will be between defending champion Djokovic and del Potro. The second seed will no doubt be secretly delighted at Federer's defeat. However, there still remains Andy Murray in his way to retaining his US Open title and he would also do well to not underestimate his next opponent. The Argentinean, del Potro, took bronze at the London Olympics 2012 and won the 2009 US Open men's singles title... so he knows his way around Flushing Meadows. Djokovic and del Potro are scheduled to play the last match of the day in the Arthur Ashe Stadium and that is not expected to start before 1.30 am (morning of 7 September).

Novak Djokovic

Doubles Action

The day will also see the mixed doubles final, with fourth seeds Kveta Peschke (CZE) and Marcin Matkowski (POL) facing the unseeded pair of Ekaterina Makarova (RUS) and Bruno Soares (BRA). The match is scheduled for a 5 pm start and will be played in the Arthur Ashe Stadium.

Meanwhile, the Louis Armstrong Stadium will see both semi finals for the men's and women's doubles event. The highlight will be the second seeded men's pair of Bob and Mike Bryan of the US taking on the ninth seeded Dutch/Pakistani pair of Jean-Julien Rojer and Aisam-Ul-Haq Qureshi (third match of the day).

For more details on the day's schedule, click here.

Where to Watch Live

You can follow all the action live, from 4 pm on Sky Sports 2 and Sky Sports HD 2. You can also catch all the scores and updates, in real time, from the tournament's official Web site.