Elo Rating for Tennis Explained
Elo estimates skill based on who you play and whether you win. Beating a stronger opponent moves your rating more than beating a weaker one.
Expected vs upset results
When the lower-rated player wins, both ratings shift more dramatically — rewarding genuine improvement.
Tiers and matchmaking
Courtlio groups players into Bronze, Silver, Gold, and Elite tiers to keep casual and advanced players aligned.
Activity and decay
Inactive ratings become less reliable. Regular play keeps your Elo representative of current form.