On the Thursday morning of the season-opening Bahrain Grand Prix weekend Nico Hulkenberg was sitting at home in Monaco when his mobile phone buzzed into life. It was new Aston Martin team boss Mike Krack with a simple message – Sebastian Vettel has COVID-19 and we need you here, right now. It was the start of a hectic 11-day adventure for Hulkenberg, who would add two more GP starts as a reserve driver to the two he logged in 2020, further extending an F1 career that began with Williams back in 2010.