Real Madrid will be the team to beat again in the European Champions League as they chase their 16th title, but a new, expanded format means pretty much everything else has changed, including the introduction of four extra clubs.
As if Real - winners of six of the past 11 finals - weren't formidable enough, coach Carlo Ancelotti will now be able to call on France's star striker Kylian Mbappe against Stuttgart on Tuesday after his move from Paris Saint-Germain.
Also available to play at the Santiago Bernabeu after injury are England's Jude Bellingham, fellow midfielder Aurelien Tchouameni, of France, and Brazilain central defender Eder Militao.
