Di Resta admits fitness will be biggest challenge in race

The 31-year-old qualified 19th after taking over the unwell Felipe Massa's Williams ahead of qualifying at the Hungaroring, and despite having trained to F1 standards and being race fit thanks to his full-time DTM drive, he is anticipating a draining race."Physically," he said when asked what will be the most difficult challenge to deal with in the race."I'm trained, but you're tense ... Keep reading