Free to play · No download · Mobile & desktop
Football Simulator: Test the Soccer Team You Draft
Can your dream XI survive a full season or a knockout tournament? UndefeatedXI is a free football simulation game built around your draft and lineup decisions. Build the squad, complete the formation, and read the simulated results—not a prediction of real-world matches.
Draft and Simulate a SeasonNo account needed to draft. Choose a formation and start playing.
What you control before simulation
Your main decisions are the mode, formation, player picks, position placement and limited rerolls. Standard modes use eleven starters; Manager Mode also drafts seven substitutes. You do not steer players during a live match or choose the score. Once the squad is complete, the engine tests the team you actually built.
What affects the result?
Player attributes feed into team strength, but the lineup is more than an average rating. The simulation also accounts for position fit, chemistry, tactical strengths and weaknesses, opponent context and randomness. A natural fullback and a center-back solve different problems. A creative midfield still needs defensive coverage. Manager Mode additionally evaluates bench coverage and depth.
League seasons and tournament runs are different tests
World XI and Premier League pursue a perfect 38-match season. Bundesliga uses a 34-match target. World Cup and Champions League follow the game’s tournament formats, with knockout pressure as well as their opening stages. Winning the trophy, staying unbeaten and winning every match are separate achievements; read the mode’s target before starting.
Understand a 38-0-0 result
The three numbers mean wins, draws and losses. A 38-0-0 league season is perfect. A 37-1-0 season is unbeaten but includes a draw; 37-0-1 includes a defeat. A strong team can still drop points because simulation contains uncertainty. Compare several runs and their tactical reports before deciding that one formation or player is always better.
What this simulator is not
This is not a live football score service, betting forecast, current transfer database or recreation of every official competition rule. Player contexts span different eras, and current data uses a dated snapshot rather than a live injury or form feed. The aim is to explore football team-building decisions inside a game, not to make claims about an actual fixture.
Ready to build your XI?
Draft and Simulate a SeasonRead the rules or get draft tips before your next run.
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