The 31-year-old, who has been working as a consultant for Sky Sports F1, will be jumping from the frying pan into the fire, having never driven the team's new-spec FW40 when he heads straight out into qualifying this afternoon.
The Brazilian first went to the medical centre before being taken to hospital after free practice 2 at the Hungaroring on Friday for precautionary checks after feeling dizzy, but was discharged and allowed to participate in Saturday's final practice session, only for him to stop his running after just twelve laps after again feeling unwell.
"He has seen the FIA medical delegate at the circuit this morning [Saturday], who is happy that he is fit to continue driving this weekend".
The team released a statement saying Massa made the decision to withdraw from the event himself after FP3 and that the team's focus is now on ensuring he can compete in the Belgian Grand Prix after August's summer break.
If the Brazilian can not take part in qualifying, he will be replaced by reserve driver Paul Di Resta.
To compound this, di Resta came into the crucial session having only driven 10 laps in an F1 vehicle since the end of 2013, when he last raced in F1.
With 10 points on his super license, Kvyat is now just two away from a race ban, and will remain so until the United States Grand Prix in Austin, Texas this October.
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"You're very anxious. Nervous but very excited".
Di Resta will take over the unwell Massa's auto, which will be renumbered to #40, from the start of qualifying.
"You just have to get in the vehicle and do the best-possible job".
Di Resta had not driven the Williams F1 vehicle on track before and had very little time to prepare. There's no pressure out there.
The Brit though admitted the experience went better than he could have possibly hoped, but still expects to struggle on race day in Budapest.
Williams said that modifying the vehicle for di Resta was not a big issue.
Di Resta will be the third British driver on the grid this weekend alongside Lewis Hamilton and Jolyon Palmer.
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