© Getty Images
Novak Djokovic, Roger Federer and Rafael Nadal enter Roland Garros in a three-way way battle for the World No. 1 ranking.

ATP stats and information guru Greg Sharko looks at the numbers behind the stories of the ATP World Tour.

THREE-WAY BATTLE FOR NO. 1 – The top three players in the South African Airways 2010 ATP Rankings will be battling for the second Grand Slam title of the season at Roland Garros.

In addition, the trio will have their eyes on the No. 1 ranking, which defending champion Roger Federer currently holds. Federer will have to hold off No. 2 and four-time Roland Garros champion Rafael Nadal and No. 3 Novak Djokovic, who also has a chance to take over the top spot for the first time.

In order for Federer to hold on to the top ranking and tie Pete Sampras' all-time record of 286 weeks at No. 1, the Swiss native must at least reach the semi-finals - that would see Federer stay No. 1 even if Nadal wins the title.

Here are the scenarios based on the points table below:
- Federer will remain No. 1 if he reaches the semi-finals but anything less and Nadal wins the title, then the Spaniard regains No. 1.
- Nadal must win the title and have Federer lose before the semi-finals to take over No. 1.
- Djokovic must win the title and have Federer lose before the quarter-finals.

CLAY COURT DOMINATOR – Here's a year-by-year look at Nadal’s clay court dominance since 2005, compiling a 169-6 match record and 27-2 mark in clay court finals on the ATP World Tour. For six straight years he's won three European clay court titles leading into Paris:

Year W-L Clay Finals Going into Roland Garros
(April-May Tourn.)
2010 15-0 3-0 15-0 3 Titles (30-2 in sets)
2009 23-2 3-1 17-1 3 Titles (34-4)
2008 24-1 4-0 15-1 3 Titles (30-5)
2007 31-1 5-1 19-1 3 Titles (39-4)
2006 26-0 4-0 17-0 3 Titles (37-6)
2005 50-2 8-0 19-1 3 Titles (39-8)

* Overall he is 196-16 (.925) in his career on clay, the best winning pct. on clay in the Open Era


OPEN ERA CLAY COURT TITLE LEADERS – Nadal is tied for fifth place with Ivan Lendl and Ilie Nastase in the Open Era clay court titles leaders list:

Players No.
1) Guillermo Vilas 45
2) Thomas Muster 40
3) Bjorn Borg, Manuel Orantes 30
5) Nadal, Ivan Lendl, Ilie Nastase 28
8) Jose-Luis Clerc 21
9) Mats Wilander 20
10) Andres Gomez, Carlos Moya 16

SOURCE