As the US Open moves into the second week, singles remain only on the show courts with the men completing the fourth round while the women move into the quarter finals. Here are my top picks from the men’s and women’s draw.
 Maria Sharapova (RUS) vs  Marion Bartoli (FRA) Arthur Ashe Stadium (H2H Maria Sharapova 4-0)
Although admittedly with a fairly nice draw, Maria Sharapova has made her first quarter final here since winning the tournament in 2005 after defeating Nadia Petrova to extend her unbeaten record on the year in three setters. Sharapova looked in huge danger at 0-2* down in the final set when the rain struck. She came back to defeat her fellow Russian 6-4 in the last. Meanwhile, Marion Bartoli put in an extraordinary performance against Petra Kvitova when she took 12 of the last 14 games on her way to a 1-6 6-2 6-0 victory. Bartoli has always been one of those players that is extremely unpredictable, and it is just as likely she is capable of being on the end of such a score rather than handing it out. A likely semi-final with World No.1 Victoria Azarenka seems likely and although the Belarussian has better head to heads against both, she was defeated by Sharapova and Bartoli in her last meetings with each player.
 Andy Roddick (USA) vs  Juan Martin Del Potro Arthur Ashe Stadium (H2H Juan Martin Del Potro 4-1)
The Andy Roddick farewell tour may finally come to an end as two former champions face off in the night session on the showpiece court. 2003 champion Roddick looked in danger against Fabio Fognini last round but pulled it out the bag in four after the Italian could not keep up his level for long enough. Like Roddick, 2009 champion Del Potro has dropped just one set on his way to the fourth round. A mini blip like that against Roddick may be more likely to punished as the American has showed that he still has it in his performances this tournament and many questioning why Roddick is retiring so early.. Whatever the result, it is likely to be a display of great hitting and is a must-watch match. It would be fitting to see Roddick go out to a fellow champion, and still someone fairly young at 23 who could in future end up being a multiple winner at Flushing Meadows.