Sports Draw Software is a Home & Education software developed by MJs Software. After our trial and test, the software is proved to be official, secure and free. Here is the official description for Sports Draw Software:

BS Editor: Contains the Excel spreadsheets for automating the recording results for sports tournaments.

TennisDraw8 - for 4-8 person knockout tennis draws with 3 set matches and all players playing 3 matches.
TennisDraw16 - for 9-16 person knockout tennis draws with 3 set matches and all players playing 4 matches.
TennisRoundRobinDraw - for pools of 8 - 10 players playing 3 set tennis matches.
RoundRobinDraw - for pools of 6 - 10 teams playing sports like football or basketball which don't have sets.