Novak Djokovic takes on Marcel Granollers on Tuesday in the fourth round of the 2013 US Open.  The match is scheduled for 2:30 p.m. ET.  Watch the live stream HERE and HERE.

Ranked No. 1 in the World, Djokovic has played well all season to earn a 47-8 record and three titles - the Australian Open, Dubai and Monte Carlo.  He reached the semifinals at Roland Garros before falling to Rafael Nadal, and he made it to the Wimbledon final before losing to Andy Murray.  His previous tournament, the Cincinnati Masters, saw him lose in the quarterfinals to John Isner.

Entering the fourth round, the Serb has yet to drop a set at this year's US Open.  He's breezed past opponents, starting with Ricardas Berankis, Benjamin Becker and then Joao Sousa on Sunday.

Winning on Tuesday keeps the possibility of a semifinal bout happening between Djokovic and Andy Murray, with the winner likely to face Nadal in the final. 

Djokovic's challenge on Tuesday is Granollers.

Granollers is known more for his play in doubles, where he's ranked No. 6.  The 27-year-old Spaniard is ranked No. 43 in singles and sports a 21-19 record for the year, along with one title win at last month's Austrian Open.

Granollers has fought every inch of the way at the US Open to reach the fourth round, needing five sets to win each of his previous three matches.  He defeated Jurgen Zopp in the first round, then Rajeev Ram in the second and Tim Smyczek in the third.

Tuesday is only the second meeting between Djokovic and Granollers, who lost to the Serb in three sets during the first round of the 2011 Australian Open.

*Stats via ATPWorldTour.com and MatchStat.com.