ITF World Tennis Number (WTN)
The ITF World Tennis Number is a rating system for all tennis players across the world, creating a global player standard to enable more appropriate matches between players of similar levels from recreational to professional tennis. This will make it easier for everyone who plays tennis in Britain to organise and play against opponents of a similar standard.
Whether you’re playing at Wimbledon (we can dream), or just meeting a friend to play matches at your local court (much more likely), everyone’s welcome – and everyone will have their own World Tennis Number.
You can get an ITF World Tennis Number for free
Getting your World Tennis Number couldn't be easier:
- If you’re an Advantage member in the Play, Play+ or Compete categories, who wants to play or compete at any level, you’ll be able to get your own ITF World Tennis Number for free. If you are not currently a member, sign up to become an Advantage member today.
- Visit your My Game Dashboard, select the Activate Your WTN button to complete 5 simple questions.
- Your ITF World Tennis Number will be allocated in 5-10 minutes.
Find out how to use your WTN to get playing through the link below:
ITF Algorithm Changes – August 2026
World Tennis will be making enhancements to the World Tennis Number (WTN) calculation on Wednesday 12 August 2026.
This enhancement to the WTN algorithm will reposition some groups of players on the current scale of 40-1. While player's across the country are likely to see their number adjusted, movement relative to others in their own age groups should be similar if they play regularly. The changes being made are based on feedback from players, coaches and national governing bodies, as well as using player data to inform the decision-making process.
- The rating algorithm will now operate on a rolling three-year rating period creating a more efficient and sustainable rating system.
- The rating calculation will now incorporate game-level scoring within each set to truly reflect how close a match was.
- To better reflect how players can change physically in terms of strength and power, especially juniors, a player development adjustment has been introduced to reflect natural development in strength, speed and endurance. For most active players who compete regularly, the adjustment will be very small.
- A rating decay mechanism has been introduced to account for players returning after time away from competition to better reflect a player’s current playing level.
Through your LTA Advantage account, you can submit match results and make it count towards your WTN!
Simply log into your Advantage account, head to 'My Game' and add your match details:
You can also download, print and scan your self-submission barcodes after each match to easily submit your scores while you're out and about.
The ITF World Tennis Number is made up of eight key principles:
- Algorithm
- Calculations
- Scale
- GAME zONe
- Singles and Doubles
- Dynamic System
- Questionnaire
- Global Results
These principles provide guidance to players on how their Number may change and what may affect it - find out more below.
If you are a venue, coach, official or organiser we have created a range of ITF World Tennis Number resources for you.
- How have WTNs been calculated?
- Will algorithm changes to the WTN become a frequent occurrence?
- How often will my ITF WTN be updated?
Head to our Help Centre and find more World Tennis Number frequently asked questions.
Find out more about the ITF World Tennis Number with our 30 minute internactive online learning course. This is designed for players, parents, coaches, officials and volunteers.