World Tennis Number (WTN)

The ITF World Tennis Number (WTN) is a global rating system for tennis players, designed to provide a standardized measure of skill level. It operates on a scale from 40 (beginner) to 1 (elite professional). This system is applicable to all players, regardless of age, gender, or ability, and includes separate ratings for singles and doubles.

https://worldtennisnumber.com/ 

How WTN is Calculated:

a. Match Results and Algorithm

b. WTN is calculated using match results from 2016 onwards.

c. An algorithm analyzes the pre-match ratings of players to predict match outcomes.

d. Players’ WTNs are updated based on actual match scores compared to predictions.

e. The system considers individual sets as separate results, impacting the WTN based on set wins and losses.

Confidence Level:

The Confidence Level indicates how reliable a player’s WTN is, based on the amount and recency of match data.

A high Confidence Level (≥70%) is marked with a blue checkmark, while a lower level (≤70%) is indicated by a grey checkmark.

Regular play and diverse opponents enhance the Confidence Level, leading to more stable WTNs.

Benefits of WTN:

Matchmaking: Helps players find opponents of similar skill levels for more competitive matches.

Player Development: Provides statistics to track progress and improve skills.

Global Standard: Facilitates participation in international tournaments and events.

Updates and Maintenance:

The WTN is updated weekly, allowing players to see their progress in real-time.

Players are encouraged to participate regularly to maintain and improve their ratings.

WTN versus Munster Player Directory

During 2026 Munster Tennis are continuing to maintain the munster player directory . See the Munster Tennis documents at the end of the page for the rules on what WTN bands you are allowed play in based on your munster directory grade and competition type.

The following table shows how the WTN bands map to the Munster Player Directory Grades:

Munster Directory GradeLowest WTN Band Allowed
Premier1
12
23
34
45
56
67