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Lewis Hamilton is at his "most dangerous" right now because his back is against the wall. That's the verdict of Mark Webber, who has warned Ferrari and Red Bull not to write off Mercedes and their main man Hamilton.

Hamilton has ruled himself out of challenging for this year's Drivers' Championship after just four races of the season, having amassed just 28 points in that time. That leaves him 58 behind the championship leader, Ferrari's Charles Leclerc.

Max Verstappen is also 31 points clear of the Briton, against whom he competed for the title last year, despite two retirements. Yet Webber, a nine-time Grand Prix winner with Red Bull, insists Hamilton must not be written off.

That's despite Mercedes' issues with porpoising. Despite the team's problems, George Russell has dealt far better with the W13's problems to amass 49 points - nearly double