Professional players have almost twin world rankings, one for men  – the ATP Rankings – and another for women – the WTA Rankings.

Both ATP and WTA computes rankings for single and doubles.

There is not a perfect scoring equivalence since there are differences in the tournament structure for men and women and even when combined events are organized between ATP and WTA there are scoring differences.

The ATP Rankings are currently called The South African Airways ATP Rankings and sums up each players added scores in the previous 52 weeks. The published scoring structure for each tournament category is the following (Source ATP):

 

	W	F	SF	QF	R16	R32	R64	R128	Q
Grand Slams	2000	1200	720	360	180	90	45	10	25
Barclays ATP World Tour Finals	*1500
ATP World Tour Masters 1000	1000	600	360	180	90	45	10(25)	(10)	(1)25
ATP 500	500	300	180	90	45	(20)			(2)20
ATP 250	250	150	90	45	20	(5)			(3)12
Challenger 125,000 +H	125	75	45	25	10				5
Challenger 125,000	110	65	40	20	9				5
Challenger 100,000	100	60	35	18	8				5
Challenger 75,000	90	55	33	17	8				5
Challenger 50,000	80	48	29	15	7				3
Challenger 35,000 +H	80	48	29	15	6				3
Futures** 15,000 +H	35	20	10	4	1
Futures** 15,000	27	15	8	3	1
Futures** 10,000	18	10	6	2	1
*Barclays ATP World Tour finals 1500 for undefeated Champion (200 for each round robin match win, plus 400 for a semi-final win, plus 500 for the final win).
** ATP Doubles Rankings points will be awarded in Futures tournaments beginning with the semi-final round.
(1) 12 points only if the main draw is larger than 56
(2) 10 points only if the main draw is larger than 32
(3) 5 points only if the main draw is larger than 32

There are several additional rules that we will not cover here. We only highlight a recent change concerning TOP 30 players, the so called Commitment players. This players have special obligation on the tour since their presence is mandatory in almost all ATP Masters 1000 and Grand Slams. In November 2011 it was decided that these players could add up their best six in tournaments below Masters 1000 category (including the Olympics and Davis Cup) but they are only eligible if “they have fulfilled their commitment to 500 events – 4 total per year (at least 1 after the US Open).”
For more insights please read Rankings FAQ from ATP.

To the ATP table published above it has to be added, since July 2011, ITF Olympics score points and, since 2009, the Davis Cup score points.

On the Olympics, the additional points were determined after an agreement between ATP, WTA and ITF (source: ITF).

ATP ranking points (singles only)

750     Gold medal
450     Silver medal
340     Bronze medal
270     Fourth place
135     Quarterfinals
70       Third round
35       Second round
5         First round

On the Davis Cup the agreement established that “accumulated points for all Davis Cup play over the preceding 52-week period will count as one result and form part of the ATP World Tour 500 category, the best of which count towards a player’s ranking.”  Only single matches count.  The scoring table from Davis Cup is the following:

Singles

.	Per Match Won	Per Match Lost	Team Bonus	Performance Bonus	Cumulative Total
World Group	.	.	.	.	.
First round – first singles loss	.	10	.	.	.
First round – first singles win	40	.	.	.	40
First round – second singles win	40	.	.	.	80
Quarters – first singles win	65	.	.	.	145
Quarters – second singles win	65	.	.	.	210
Semis – first singles win	70	.	.	.	280
Semis – second singles win	70	.	.	.	350
Final – first singles win	75	.	75*	125**	425/500*
Final – second singles win	75	.	.	.	625
World Group play-offs	.	.	.	.	.
First singles win	5	.	.	.	.
Second singles win	10	.	.	.	.

 

* Team bonus awarded to a singles player who wins seven live matches and his team wins the competition.

** Performance bonus awarded to a singles player who wins eight live matches.

Only the higher of the two bonuses will be awarded to a player.

 

For addicional insight visit Davis Cup site.