Red Bull cancelled Sergio Perez's media commitments at their home Austrian Grand Prix on Thursday after the Mexican Formula One driver reported sick.
"He became unwell last night and is taking the day to rest to ensure he's in the best possible health for this weekend's race," the team said.
Perez is Max Verstappen's closest title rival but still a massive 69 points behind his double world champion team mate after eight races.
The Mexican needs a strong showing at Spielberg after failing to qualify in the top 10 or stand on the podium in the last three races.
This weekend is the second sprint event of the season and Perez won the first one in Azerbaijan in April, going on to win the Sunday grand prix as well.
That race in Baku remains his most recent win and he has had only one podium finish since then while Verstappen has won the last four.
Friday features a single practice session and qualifying for Sunday's race with Saturday a standalone sprint day.
Defending champion Mirra Andreeva was among a raft of top seeds that moved into striking position at the Dubai Duty Free Tennis Championships, with a star-studded quarterfinal line-up setting up a thrilling climax to the WTA1000 event.
Italy’s Antonio Tiberi powered to victory in the UAE Tour's 183 km stage three in Ras Al Khaimah, conquering the new Jebel Mobrah climb to take both the stage win and the overall race lead.
Pakistan became the final team to qualify for the Super Eight of the Twenty20 World Cup after Sahibzada Farhan's maiden international century powered them to a 102-run victory over Namibia in Colombo on Wednesday.
South Africa made four changes yet scarcely missed a beat as they trounced the United Arab Emirates by six wickets in the Group D round of the Twenty20 World Cup at the Arun Jaitley Stadium on Wednesday.
Manny Pacquiao confirmed he will face former junior welterweight world champion Ruslan Provodnikov in Las Vegas on April 18, marking his second outing since returning from a four‑year retirement last year.
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