Here are some of my predictions for the numerous quarter-finals to be played out tomorrow:
A strong line-up has made the quarter-finals with the highlights being the first quarter-final between Kohlschreiber and Almagro and the all-German clash between Haas and Mayer.
Philipp Kohlschreiber to beat Nicolas Almagro in 3 sets
Juan Monaco to beat Jeremy Chardy in 3 sets
Marin Cilic to beat Albert Ramos in 2 tight sets
Florian Mayer to beat Tommy Haas in 2 tight sets
The American heavy draw looks likely to provide three US semi-finalists although four places are still up for grabs in the quarter-finals.
Andy Roddick to beat Michael Russell in 2 sets
Kei Nishikori to beat Go Soeda in 3 sets
Rain has cancelled all play today, which means only one quarter-final has been decided so far.
Polona Hercog to beat Tsvetana Pironkova in 2 sets
The tournament in San Diego is still completely wide open; it was a shame to see Heather Watson go out yesterday because she had a great chance to go deep in this draw. The remaining second round matches including Jelena Jankovic and Dominika Cibulkova will be played out tonight.
Nadia Petrova to beat Varvara Lepchenko in 2 sets