Mercedes battling “fundamental” issue with new W15 F1 design

The German manufacturer had come into this year hoping that a design revamp would help it close the gap on pacesetter Red Bull.

However, drivers George Russell and Lewis Hamilton have endured a challenging first two races to the campaign with a clear weakness to the car now exposed.

Team principal Toto Wolff says Mercedes does not fully comprehend what is going wrong in high-speed corners, as its real-world performance is not matching what its…