It's a young man's game, supposedly. Yet, for all the pounding athleticism and boundless energy that youth can bring, there is no substitute for experience at the highest level.
The Champions League is the pinnacle of modern club football and it is only at such a standard that the game's greats truly seal their standing within the game. For many, such as the evergreen Ryan Giggs (pictured above), age in no limitation.
In picking an "Over-30 Champions League XI", there are some decisions that need to be made as to criteria for selection.
In order to reward performance this season, this selection rewards those who are a regular starter at a club in the round of 16 aged 30 or over when fixtures began this week.
As the following selection shows, there are many players in their fourth decade still very much at the top of the footballing world.