What does Atlético de Madrid lose from the departure of João Félix?

João Félix's time as an Atlético de Madrid player has come to an end this season. Chelsea have made his contract official until the end of this course.

Joao Felix £8m transfer trigger has Arsenal and Man United eyeing try before you buy January deal - Daily Record

João Félix - Wikipedia

Barça does not lose sight of Vitor Roque and Joao Félix for this summer

Joao Felix's Arsenal transfer stance revealed as Atletico Madrid make huge £120m demand

Simeone questions Joao Felix red card as Atletico draw a blank

Griezmann and Atletico vie for Spanish title as they visit Barcelona and former teammate João Félix - The San Diego Union-Tribune

The Jury Is Out': Assessing Joao Felix's Atletico Madrid Career So Far, News, Scores, Highlights, Stats, and Rumors

Revealed: Why Atletico Madrid rejected Man Utd's 'significant offer' for Joao Felix

Arsenal, Chelsea and Man Utd in Joao Felix transfer battle as Atletico Madrid demand £120m for out-of-favour star

Joao Felix detail in Chelsea deal hints at Diego Simeone exit after Atletico Madrid spat - Mirror Online

Rumour Has It: Chelsea plan January loan move for Atletico Madrid forward Joao Felix

What does Atlético de Madrid lose from the departure of João Félix?