Barcelona attacker Antoine Griezmann was left frustrated after they blew a lead late on against Atletico Madrid in their Supercopa de Espana semifinal defeat.

Leading 2-1 from the 62nd minute through the Frenchman's header, Barcelona then capitulated with Atleti scoring twice in the last ten minutes to reach Sunday's Supercopa de Espana final against Real Madrid with a 3-2 victory.

"I think we lost due to our own errors and they had the legs at the end," Griezmann stated on the final whistle.

"It cost us and we have to work hard in order to continue.

"We all made errors. I played a bad pass and then their goal arrived.

"They are errors which can cost you a Champions League or a league title," he lamented.