By Nicole Rojas (staff@latinospost.com) | First Posted: Sep 03, 2012 11:40 AM EDT

Day seven of the U.S. Open saw a lot of action from both the men and women's side and an upset from German Philipp Kohlschreiber over No. 9-seeded John Isner.

No. 2-ranked Serbian Novak Djokovic defeated Frenchman Julien Benneteau in three sets 6-3, 6-2 and 6-2. According to USA Today, Djokovic advanced to the fourth round of the title games for the sixth year in a row.

Sunday's main event, the match between American No. 20-seeded Andy Roddick and Italian Fabio Fognini, saw Roddick hold off retirement for another day. Roddick, who announced his retirement on Thursday, defeated the Italian in four sets 7-5, 7-6(1), 4-6 and 6-4. Roddick will play against Argentine No.7-ranked Juan Martin del Potro in his next match, USA Today reported.

Spaniard David Ferrer was also victorious on Sunday, beating Australian Lleyton Hewitt in four sets 7-6(9), 4-6, 6-3 and 6-0. Hewitt, who just three months ago had an operation on his foot, struggled in between points, reported USA Today.

On the women's side, Russian Maria Sharapova, No. 3-ranked, defeated fellow Russian Nadia Petrova in three sets 6-1, 4-6 and 6-4. No. 1-ranked Victoria Azarenka, from Belarus, defeated Anna Tatishvili in two sets 6-2 and 6-2.

Spectators on Sunday also witnessed the first major upset on the men's side when German Philipp Kohlschreiber beat American No. 9-ranked John Isner in five sets 6-4, 3-6, 4-6, 6-3 and 6-4. Isner, who received a foot fault, demonstrated his anger over calls by chair umpire Carlos Bernardes by firing a ball into the stands and mashing his racket, the New York Times reported. The two actions earned him two code violations and a point penalty.

Brit Laura Robson, who played two outstanding upsets earlier in the week, was defeated by defending champion Samatha Stosur. Stosur ended Robson's winning streak, defeating the Brit in two sets 6-4 and 6-4.

Robson told Reuters, "I felt like I didn't play as well as I did in my last three matches. You know, I just hit too many unforced errors."

Labor Day matches should also prove eventful with the Williams sisters, Roger Federer and Andy Murray all making appearances.

Video Highlights

Video highlights of the U.S. Open can be seen here.

Monday Schedule:

Women's Singles- Andrea Hlavackova vs. Serena Williams at Arthur Ashe Stadium (11 a.m. EST)

Men's Singles- Roger Federer vs. Mardy Fish at Arthur Ashe Stadium (11 a.m. EST)

Women's Doubles- Serena and Venus Williams vs. Maria Kirilenko and Nadia Petrova at Arthur Ashe Stadium (7 p.m. EST)

Men's Singles- Andy Murray vs. Milos Raonic at Arthur Ashe Stadium (7 p.m. EST)

FULL MONDAY SCHEDULE

© 2015 Latinos Post. All rights reserved. Do not reproduce without permission.