With the top-heavy nature of modern football, the Champions League runs the risk of becoming a little predictable. Every season there are a handful of surprises, however, and 2013/14 will surely be no different.
Whether it is an unfancied team making a run to the quarter-finals, a glamour club getting dumped out of the competition at an early stage or a relatively unknown player making a name for himself, you can guarantee that more than a few unpredictable events will occur to keep football lovers interested.
Sure, there's a high probability the English and Spanish clubs will do well and the final will be contested by Barcelona and Bayern Munich or clubs of a similar status, but it is nice to anticipate a few shocks along the way.
Here are 25 surprises that could shake up the competition and ensure fans and the media have plenty to talk about.