What is the Flex Rating? Start from an NTRP self-rating and track your tennis level in the Flex league
By Flex Tennis Taiwan ·
This guide from Flex Tennis Taiwan explains where your level in the Taipei tennis league comes from and how it changes. It reflects how the Flex website and league system actually worked on the check date listed at the end.
Play Flex matches and see your progress
The match results you report in the Flex league add up to your Flex Rating, which your profile shows as "Flex Tennis Rating". The rating updates when each season is settled, and under Profile → Tennis Profile → Flex Rating history you can see each season's win–loss record and what your rating changed from and to. The more seasons you play, the more clearly this record shows your progress.
Figure: Flex Rating history on the Profile page (test account, shown in the Chinese-language view, for illustration)
If you're registering for the first time and don't have a Flex Rating yet, you start from a self-rated level.
Step one: rate yourself
When you sign up you choose a skill level from four options, which borrow NTRP (National Tennis Rating Program) numbers as a reference. Pick the level closest to how you play in matches now:
Beginner (2.5): Players who can play and score a full match on their own but have little match experience.
- You can keep a slow baseline rally going with players at your level.
- Your serve swing is still short and your toss inconsistent, and moving up to the net doesn't come naturally yet.
- You're still learning where to stand in singles and doubles.
Skilled (3.0): Players who have played for a few years and already play matches.
- Medium-paced balls come back fairly steadily, but some strokes still feel awkward.
- Your accuracy drops when you aim for direction or depth, or add pace.
- In doubles you mostly play one up, one back, and the net can still feel uncomfortable.
Competitive (3.5): Players with a solid game built over years of matches who are starting to think about tactics.
- You can direct moderate-paced rallies, but depth and variety are still lacking.
- You're more at ease at the net and starting to work with your doubles partner.
- Lobs, overheads, volleys and approach shots don't yet work reliably for you.
Advanced (4.0+): Players with a dependable game at the baseline and the net, whose doubles teamwork shows. Players at 4.5 and above, who can vary pace and spin, also choose this level.
- In moderate-paced rallies you can direct the ball and vary its depth off both sides.
- Your second serve is dependable, and your serve sometimes forces errors.
- You use volleys, overheads and approach shots effectively and spot chances to finish points.
Players who don't have a Flex Rating yet are grouped by this self-rating. If you're just starting out, first check whether you can play and score a full match on your own, because this is a competitive league, not a coaching program. Not sure? Get in touch.
Key points about the Flex Rating
Your Flex Rating is calculated only from your Flex league match results; it doesn't read or convert NTRP, UTR or any other outside rating.
- The level you see, and the system's internal estimate. The rating on your profile is your level for this season; the system also keeps an internal estimate that is recalculated as this season's matches come in, but it isn't shown on the website.
- Recent matches count more. Within a season, the later a match is played, the more weight it carries.
- Who you play and how the match went both matter. Each match takes into account your opponent's estimated strength at the time, then the result and the game margin. A win awarded because your opponent didn't show up (a walkover) doesn't affect your rating.
- Last season's results carry into the next. A new season doesn't start from zero; first-time players start from the level of the division they're placed in.
- Your rating updates at the end of the season. The level shown during the season stays fixed so matchups stay stable, and ratings are adjusted all at once at the season-end settlement. Playoff matches count too.
- Fewer than 3 rated matches means you keep your current level. First-time players get their division's level instead. If you play no matches all season, your rating doesn't change.
Divisions and arranging matches
Divisions are based on your Flex Rating and your preferred playing districts; players without a Flex Rating are placed by their self-rated level. Divisions are announced before the season starts.
On kickoff day you'll get an email with your division, contact details for 6 to 15 opponents, and a link to the league standings page. From there, contact your opponents directly and agree on a time and place that suits you both. In one season, at most two matches against the same opponent count.
Your place in the division standings is separate from your Flex Rating: standings go by wins, game-win percentage and total games won. See the league rules for the complete rules.
FAQ
I only played one or two matches this season. Why didn't my rating change?
With fewer than 3 rated matches, settlement keeps your current level, and first-time players get their division's level. The matches you played this season aren't wasted: they still carry into next season.
Can I see the system's internal estimate?
No. The website shows only your Flex Tennis Rating, and Flex Rating history lists each season's win–loss record and your rating before and after settlement.
Is the Flex Rating my NTRP?
No. The self-rating options borrow NTRP numbers as a reference, but your Flex Rating is calculated entirely from Flex league match results and is not an official NTRP or UTR rating.
Last checked
This guide was checked on October 10, 2026 against the Flex Tennis Taiwan website and the way the league system calculates ratings. The calculation, grouping and rules may change from season to season; the league rules and each season's announcements take precedence. If you spot something wrong, please email us.
Ready to start building your Flex Rating? Take a look at the Flex Taipei tennis league.