​​Atletico Madrid and France forward Antoine Griezmann has revealed that snubbing ​Barcelona and signing an extension with his current club was the hardest decision he ever made, while also promising to help mount a challenge for the league title.

Griezmann was expected to join Barcelona at the end of the last season, having postponed signing for the La Liga champions because Atletico were banned from signing players and could not get a replacement for him.

However, the Frenchman announced that he was staying with Atletico once again, and signed an extension once again, leaving the Spanish champions scrambling to find a replacement.

"Like I said, I was given love," he told Telefoot, according to ​AS. "Everyone wanted to know how I was doing. It was the hardest decision of my career. I woke up my wife at 3am to talk about it."

"In the Champions League we will try to do better than last year when we did not reach the knockouts," he said.

"It was in a large part my fault because I was not good mentally.

"In the league, we will try to stay with both [Barcelona and Madrid]."

Last season, Atletico finished second in the league but were knocked out in the group stages of the Champions League. They however went on to win the Europa League, and after which he helped France win the World Cup in the summer.

It remains to be seen if Atletico can do better this season, especially after their poor start to the league season.