Mercedes are said to be arriving at the Sakhir circuit with a W13 that doesn’t have any sidepods whatsoever, and their rivals are worried.

That’s according to a report in Corriere dello Sport.

Debuting their all-new cars last month in Formula 1’s group shakedown at the Circuit de Catalunya there were several different sidepod designs on display.

While Ferrari went with a baby bath with louvred sidepod tops, the Red Bull RB18 features a dramatic undercut. Alfa Romeo’s had a bit of both.

As for Mercedes, they opted for a multi-geometry surface before the reigning Constructors’ Champions then trialled louvred sidepods during the opening test.