Carlos Sainz thinks he could take on "any driver" in Formula 1.
"Charles is a very strong driver and that has helped me to improve," Sainz said.
"But I've managed to always beat my teammates and find new limits. I still don't have the perfect feeling in the Ferrari to drive as consistently at a high level as I did at McLaren in 2019 and 2020," he admitted.
"But I know where I can still improve."
"Everyone recognises how good these drivers are," he said. "To prove myself against them gave me the ability to know that I can take on any driver.
"If I settle in well in a team and the car works, I'm not afraid of anyone."
However, Sainz acknowledges that his public image doesn't always match up with his own self-belief.
"Sometimes I can't get it through my head why certain people give me a lower rating," he said. "From my side, I've never had the impression that I'm worth any less than my teammate.
"Anything that Max, Lando, Nico or Charles can do, I can do that too. When a company like Ferrari chooses you, you know you've done something right in your career.
"It's nice to know that I'm valued by the teams, including those I've left."