Performance in F1 traffic is big Haas weakness

In Miami, the American team introduced its first major upgrade of the season in the form of a revised floor.

Helped by issues for others and a red flag in Q3, Kevin Magnussen qualified a surprise fourth.

The Dane made a bad start and, after doing his best to make it hard for rivals to pass – notably Ferrari’s Charles Leclerc – he eventually finished 10th.

Meanwhile, his team-mate Nico Hulkenberg fell from 12th on the grid to 15th at the flag.

Steiner said that the…