UEFA president Michel Platini says the football body could consider scrapping the Europa League and expanding the more popular Champions League.
Platini tells French daily Ouest-France that UEFA is having an "ongoing debate" about possible changes to its competitions for the 2015-18 cycle of broadcasting contracts.
Platini says "we're discussing it. We will make a decision in 2014."
The Europa League earns one-sixth of the Champions League's €1.34 billion ($1.73 billion) annual revenue, which is mostly shared by 32 clubs which reach the group stage.
The Europa League's longer and more complicated format has also proved unpopular with some clubs and fans.
However, scrapping it in favour of a 64-team Champions League would likely be opposed by European Club Association members whom UEFA is obliged to consult on competition changes.