Spain’s Rafael Nadal has confirmed his status as tennis’ best, but that’s not stopping the other elite players in aiming for the title in the ATP World Tour Finals at the O2 in London.

Novak Djokovic of Serbia and Juan Del Potro of Argentina take on each other on Thursday as they hope to join Nadal in the semifinals of the final tournament of the ATP season. Both Roger Federer of Switzerland and Richard Gasquet of France also want to keep their final four hopes alive when they meet in the first match-up of the day.

READ ALSO: On Top of Tennis: Rafael Nadal is ATP World Number One for 2013

Djokovic or Del Potro needs to win in straight sets to qualify for the semifinals. If one does not win in two sets, the first semis qualifier in their group will be decided by the other match-up; a Djokovic and Federer win means that the Serbian qualifies and a Del Potro and Gasquet win allow the Argentine to advance.

Djokovic defeated Federer, 6-4, 6-7 (2), 6-2, and Del Potro beat Gasquet, 6-7 (4), 6-3, 7-5, in the opening matches in Group B.

Djokovic has dominated Del Potro in their head-to-head match-up, winning 10 of 13 matches. Del Potro's last win (4-6, 6-4, 6-4) came at the ATP World Tour Masters 1000 in Indian Wells, California in March 2013.

Meanwhile, Federer has a similar dominant record against Gasquet with winning 10 of 12 career matches against the French.

2013 ATP World Tour Finals Round Robin Live Streaming and Schedule

Nov 8, 2013 - AEDT

1:00 a.m. Roger Federer (Switzerland) vs. Richard Gasquet (France)
7:00 a.m. Novak Djokovic (Serbia) vs. Juan Martin Del Potro (Argentina)

LINK 1 | LINK 2 | LINK 3 (Other links added once available)

Disclaimer: The inclusion of any link/s shall be purely for informational purposes, gathered from sources made available on the Internet; such act shall not be meant to aid or abet, impliedly or otherwise, the act/s of any Web site/s cited.