Last two F1 races a “clear turning point” for rookie Sargeant

The American had a difficult start to a schedule dominated by unfamiliar venues and tricky street and temporary tracks that saw him involved in a string of incidents as he struggled to keep up with team-mate Alex Albon.

However, in Austria he had a strong run to 13th in a race of low attrition, while at Silverstone he finished 11th and just four seconds behind the Ferrari of Carlos Sainz.

Robson acknowledged that the return to Europe and tracks…