Russell: Hamilton is going to come back fighting even more

Russell was fourth overall last year compared to sixth for Hamilton, the F1 record-holder with 103 wins and 103 pole positions.

The performances of Russell surprised some observers considering he joined from a Williams team used to languishing at the back. But he secured Mercedes' only pole position and victory — in Hungary and Brazil — while Hamilton didn't win a race for the first time in a F1 career dating to 2007.

“Those stats against a guy like Lewis are pretty irrelevant. He's achieved 100 and more poles and victories," Russell said on Thursday ahead of the season-opening Bahrain Grand Prix on Sunday.

As for his own form, he said: "Race pace is maybe something I want to improve slightly, and I probably improved that towards the end of the year compared to Lewis. But he's just an animal and he keeps on fighting, he keeps on going, and he never gives up. So I think he's going to come back fighting even more."

Both Mercedes cars struggled for much of last year with the ground effect known as “ porpoising,” an aerodynamic issue where cars hop and bounce on the track.

Preseason testing last week suggested the problem is a thing of the past, and Russell is looking forward to a battle with Hamilton without stressing about the car.

“I'm excited to have that challenge," Russell said. "But ultimately the two of us are looking for the top step on the podium, not just the No. 1 spot on the team.”

Strolling through the paddock, Russell gave a thumbs up while Hamilton strolled through the paddock with an eye-catching all-red outfit and red-framed sunglasses.

During last week's testing at the venue, there were issues with the Mercedes W14's balance and traction, but Russell is confident those have been resolved: “We had a really good time between the test and the race to analyse what happened. There were a few things going on with the car that we didn't quite expect.

"But we've been able to resolve pretty easily. Just working slightly in the wrong window, we were running with a different rear wing in the Bahrain test just for some correlation work, and that wasn't an optimal rear wing," Russell explained.

Mercedes won a record eight straight F1 constructors titles before Red Bull ended that run last year when Max Verstappen crushed the field on his way to a record 15 wins and a second straight world title.

“We need to trust in our process. Mercedes have built a world championship-winning car for eight seasons in a row," Russell said. "We've still fundamentally got all of the same guys there, and they haven't just forgotten how to build a fast race car.”

But neither has Red Bull, and Verstappen said during testing the RB19 could be even better than last year's car, Russell tends to agree that the Bulls are ahead, for now: “It's definitely fair to say Red Bull are in a league of their own this weekend in Bahrain.

"It will probably be a nice fight for second place probably between (Mercedes), Ferrari and Aston Martin. I absolutely believe as the season progresses we're going to close that gap," added the Englishman.