Here is the full list of all 75 Tennis Manager 2021 achievements.
Upgrade Sport Center to maximum level
Upgrade Tennis School to maximum level
Upgrade Business Center to maximum level
Upgrade Medical Center to maximum level
Upgrade an infrastructure
Played a Match
Recruit a player into the academy
Reach Legend experience level
Reach Very Experienced level
Reach Experienced level
Finish a full season
Finish 5 seasons
Finish 10 seasons
Finish 30 seasons