Paul Di Resta has been drafted in at the last minute to replace an unwell Felipe Massa at Williams ahead of the Hungarian Grand Prix.

Massa was unwell following Friday practice, and was taken to the MH EK Honvedkorhaz hospital in Budapest for further analysis after visiting the circuit medical centre.

Although he felt better on Saturday morning and was given the all clear to resume driving in final free practice, he was forced to cut short his running as he felt unwell again.

Amid concerns about Massa’s fitness for what is usually a particularly physically demanding grand prix, Williams decided to call up di Resta as a substitute.

Williams reserve driver di Resta, who had been put on standby overnight, has been given the nod to take over the car for qualifying.

Without having driven in any of the practice sessions held so far this weekend, di Resta will need to get within 107% of the fastest time to be guaranteed a place on the starting grid.

It will be di Resta’s first F1 outing since his final race for Force India at the 2013 Brazilian GP.

He has since competed in the DTM with Mercedes.

VIDEO: Massa explains his illness

.@MassaFelipe19 explains his withdrawal from the #HungarianGP pic.twitter.com/aG7G2ftWF4

— WILLIAMS RACING (@WilliamsRacing) July 29, 2017