After missing the Hungarian Grand Prix, Felipe Massa won't be driving in this week's in-season test in Budapest, traveling home to focus on his health.
Massa was hit with a virus on Friday and pulled out of the remainder of the race weekend in Hungary, with Williams bringing in reserve driver Paul di Resta to replace unwell Brazilian.
Williams will put Lance Stroll to work on Tuesday at the Hungaroring while F2 racer Luca Ghiotto will take over from the Canadian on Wednesday as initially planned.
Massa will hopefully make a full recovery in time for the Belgian Grand Prix at Spa, scheduled at the end of the month.
"I think we're optimistic," said Williams tech boss Paddy Lowe.
"It would be really a great shame if he wasn't ready for Spa. That's four weeks away so he ought to be in good shape by then."
Gallery: The beautiful wives and girlfriends of F1
Keep up to date with all the F1 news via Facebook and Twitter
Andrea Stella has fired a warning shot at Formula 1’s rule-makers, insisting qualifying must become…
French F1 fans are in for a treat – and a blast from Grand Prix…
For all the talk of fresh momentum at Alpine, Flavio Briatore admits that there is…
Mario Andretti won the 1977 US Grand Prix West at Long Beach on this day…
Formula 1’s bold new era is already under fire – and now the sport’s powerbrokers…
While Formula 1 sits idle this month, Max Verstappen isn’t waiting around, the Dutchman heading…