Antoine Griezmann says he's happy in the current 3-4-3 system at Barcelona.

Griezmann started and impressed as Barca thrashed Real Sociedad 6-1 in San Sebastian.

"What suits me best is being on the pitch. This is what I want the most. That's what I want, but yes, with three central defenders, we are safer, the midfielder works a lot," he said.

"The coach has found the key. It is then a question of adapting to the system that the team needs.

"Work and more work."