How does Joao Felix's Atletico Madrid start compare to Griezmann's? Atletico Madrid Both sparked debate among the fans

It's not an easy of a task to adapt to Diego Simeone's philosophy at Atletico Madrid, with both Joao Felix now and Antoine Griezmann in the past being well aware of this.

The Portuguese youngster has been an undisputable starter in his first 10 games of the season, despite being replaced in eight of those.

Griezmann, on the other hand, didn't secure a regular spot in the first XI during his first season until his extraordinary performance against Athletic Club, just before the Christmas break.

Joao Felix has scored three goals in the first stretch of the season, while Griezmann had managed just one after five games as a starter and another five coming off the bench in 2014/15.

Both landed in Madrid as the club's marquee signings and were considered as very important investments for the team's future.

When the Frenchman was replaced by Raul Garcia in an Atletico game against Celta Vigo, home fans whistled Cholo's decision, in a situation that resembles what happened in the last derby against Real Madrid.

With Los Rojiblancos struggling to find their way to the opposition area, Simeone replaced the Portuguese prodigy with Marcos Llorente and jeers were heard from the Estadio Wanda Metropolitano stands.

The two players may be different in many aspects, but they are very similar in terms of attitude, both placing their confidence in their coach's work.