The 2013 Australian Open is beginning to heat up in Melbourne as the top tennis players in the world vie for the title.
The day also featured Jie Zheng of China upset No. 9 seed Samantha Stosur and Polish 22-year-old Jerzy Janowicz blow his lid...then battle back from a two-set deficit to emerge victorious over Somdev Devvarman.
Of course, there is still plenty of tennis to go in the 2013 Australian Open. Here's a look at the TV schedule, bracket guide and top matches to watch on Day 4.
Day 4 TV Schedule
|Second Round||11 p.m. - 7 a.m.||ESPN2|
*Coverage begins Wednesday night and continues into Thursday morning.
You can watch every match on ESPN3.
Click here to view the entire men's bracket.
Click here to view the entire women's bracket.
Click here to view the entire Day 4 schedule.
Matches to Watch
Victoria Azarenka (1) vs. Eleni Daniilidou
The defending champion, 23-year-old Belarusian Victoria Azarenka has risen to stardom.
Not only did she win the Australian Open last year, she went 69-10 overall with six singles titles. She also advanced to the semifinals of Wimbledon and the final of the U.S. Open.
Azarenka, who disposed of Monica Niculescu in straight sets in the first round, will face Eleni Daniilidou of Greece in the second round. Daniilidou beat Azarenka in Paris in three sets in 2008 but lost in straight sets in the Fed Cup in 2011.
The 30-year-old Greek defeated Karolina Pliskova in three sets in the first round.
Serena Williams (3) vs. Garbine Muguruza Blanco
To say Serena Williams is scary in majors would be an understatement.
Regarded as one of the greatest tennis players of all time, Serena owns 15 career Grand Slam singles titles. She also won Wimbledon and the U.S. Open last year.
Serena has never faced 19-year-old Garbine Muguruza Blanco. The Venezuelan went 35-25 last year on the WTA Tour, beating ranked opponents Vera Zvonareva and Flavia Pennetta in the Sony Ericsson Open.
Last year was supposed to be all about Novak Djokovic and Rafael Nadal while Roger Federer aged, but the 31-year-old Swiss great ended up going 71-12 with six singles titles while winning Wimbledon in the process.
Still, Djokovic and the brimming Andy Murray will likely be great challenges for Federer this year as he aims to capture his 18th career Grand Slam singles title.
Federer may still be an underdog in the 2013 Australian Open in some people's eyes, but if Wimbledon 2012 taught us anything, it's to never doubt a true great.
Federer is 17-2 lifetime against Nikolay Davydenko, including 4-0 in majors.
Joao Sousa vs. Andy Murray (3)
While Andy Murray is the No. 3 seed and the No. 3 player in the world behind Djokovic and Federer, many believe this will be the best year of the 25-year-old's career.
Murray got the monkey off his back in 2012 when he won his first career Grand Slam singles title against Djokovic in the U.S. Open. He also won the gold medal at the 2012 London Olympics and went 56-16 overall with three singles titles.
Murray already won in Brisbane this year, and he's coming off a straight-set victory over Robin Haase.
The Brit has never faced the 23-year-old Joao Sousa. Sousa is coming off a straight-set victory over John-Patrick Smith.