Gameiro chose Atletico over Barca when leaving Sevilla.
"There was the possibility of going to Barcelona, but in my head it was clear I wanted to go to Atletico. When Atletico contacted me, it was clear," he told Radio Cope.
“You know that when you have players like Messi, Suarez and Neymar in your team, they want to play all the time and always for 90 minutes.
“Therefore it's very difficult to play and I think that Atletico's style is better for my qualities.
"Cholo [Diego Simeone] phoned me and told me he wanted Diego Costa, but it was very difficult and I was the other option.
“It didn't annoy me, it's something which happens in football. I prefer that people are clear with me. Now I'm in Madrid and that's the main thing."