Antoine Griezmann says Atletico Madrid winning the UEFA Super Cup justifies his decision to stay at the club.
Griezmann was reportedly a target for LaLiga champions Barcelona for the second year in a row, but he announced he would stay at Atletico in a television documentary.
Griezmann was out-of-sorts in Wednesday's 4-2 Super Cup extra-time victory in Tallinn, lasting only 57 minutes as he builds up his fitness levels ahead of the new season.
Diego Simeone is now the most successful head coach in Atletico history with seven major titles and Griezmann's faith in the Argentinean was central to his decision to stay.
"I stayed because there was a good project," Griezmann said to Movistar.
"I have confidence in this club, in Cholo [Simeone]... Today I saw that I was not wrong."
: "It was a spectacular match" August 15, 2018
Atletico had to come from behind against the Champions League holders despite Costa giving them the lead in the first minute with the fastest goal in Super Cup history.
"I was a little bit drowned because it was my second game," Griezmann said.
"In the end the important thing was to get ahead on the scoreboard, we made a very complete final.
"We know that physically the two teams have not reached 100 per cent, the key was the desire to win.
"It was time for us to win the UEFA Super Cup again, it was very important to start the season like this."
