The 23-year-old completed a loan switch to Camp Nou on transfer deadline day, and he made his debut for the Catalan giants as a substitute against Osasuna in La Liga on Sunday.
There is no obligation to buy the Portugal international, and he extended his contract at Wanda Metropolitano until June 2029 before his loan switch, so he will be returning to Atletico next summer.
Felix's future was the subject of much speculation over the summer, with a number of clubs linked with his services, including teams from the Saudi Pro League.
According to Mundo Deportivo, Man United and Liverpool both made offers for the Portuguese during the summer window, in addition to Aston Villa and Al-Hilal, but he turned down the bids in order to hold out for his dream switch to Barcelona.
The report claims that Felix was not a priority for Barcelona head coach Xavi, but he was still determined to secure a move to the La Liga champions.
Man United are believed to have wanted him on loan, while Liverpool were thought to be willing to offer Atletico the chance to sign Darwin Nunez as part of a swap deal for the attacker.
Felix is also said to have taken a pay cut in order to secure a move to Camp Nou, with the player only expected to receive €400,000 (£342,000) for the season to represent Barcelona.
The forward was not involved for Atletico in the early stages of the campaign due to the speculation surrounding his future at Wanda Metropolitano.
Felix's relationship with Atletico head coach Diego Simeone is believed to have broken down towards the end of last year, which
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