Paul di Resta believes that Williams has made a risky decision with its driver line-up for 2018. The Grove-based squad retained Lance Stroll for a second year, but had to search for a replacement for Felipe Massa, who retired from the sport following the Abu Dhabi Grand Prix.

The team ultimately chose Russian Sergey Sirotkin, who took part in a two-day test with Williams alongside Robert Kubica. Kubica too was hoping to win the race seat, but had to settle for the role of reserve and development driver.

Di Resta joined Williams in 2016 with reserve driver duties, and was called into action at the 2017 Hungarian Grand Prix when Massa was deemed too ill to race.

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