Ferrari team principal Fred Vasseur was hospitalised ahead of Saturday's qualifying at the Monaco Grand Prix.
Vasseur, 58, was on hand Friday when Ferrari's two entries topped the practice sessions for the Formula 1 race.
Ferrari confirmed that Vasseur would miss Saturday's critical qualifying day for unspecified medical reasons.
"Following some medical checks, Fred will remain under observation at a local medical facility. No further medical information will be provided," the team's statement said. "We wish Fred a speedy recovery and look forward to seeing him back at the track soon."
Ferrari drivers Lewis Hamilton and Charles Leclerc are both looking for their first win of the season on Sunday.
Through five races, Leclerc ranks third and Hamilton fourth in the F1 drivers' standings. Ferrari trails leader Mercedes in the constructor standings.
Vasseur replaced Mattia Binotto as team principal at Ferrari ahead of the 2023 season. Before that, the Frenchman held the same position at Sauber/Alfa Romeo (2017-22) and Renault (2016).
Sheikh Mansoor bin Mohammed bin Rashid Al Maktoum, President of the UAE Olympic Committee, held a special ceremony in Dubai to honour the UAE athletes for creating history at the 20th Asian Games.
Fulham coach Alvaro Arbeloa has been fined £25,000 (AED 122,000) and given a warning by the Football Association (FA) over comments suggesting officials would not let Manchester United lose.
The 2026 Emirates NBA Cup gets under way on Friday, October 30, with the New York Knicks taking on the Philadelphia 76ers and the Los Angeles Lakers visiting the Golden State Warriors.
Nicolo Tresoldi's hat-trick powered Club Brugge to a stunning 4-3 Champions League victory at Inter Milan on a night of scares for Europe's heavyweights on Tuesday, with Bayern Munich held 3-3 at Viking Stavanger while Barcelona recovered to beat Galatasaray 4-1.