I cannot provide a direct link here due to copyright gray areas, but googling "UEFA Champions League 1999 MyAbandonware" will get you there in seconds.

You won’t find this game on Steam, GOG, or Origin. Why? Licensing hell. The music, the team licenses, the UEFA branding, and the now-bankrupt publisher (Gremlin Interactive) mean this title is trapped in abandonware purgatory. The original CDs are rare and often suffer from "CD rot."

If you are a retro gamer feeling nostalgic for chunky polygons, iconic licensed music, and the specific thrill of hearing that famous anthem before a virtual kick-off, you’ve come to the right place. Here is everything you need to know about finding, downloading, and running this classic on a modern PC.