What happened: Oracle Red Bull Racing announced Nikola Tsolov, a Bulgarian driver, as its reserve driver for 2027. He will also serve as reserve for Visa Cash App Racing Bulls, per Red Bull's announcement and reaction posts.

Why it matters: Tsolov is a member of the Red Bull junior team and previously took part in Red Bull's Mexico GP opening practice plans. The reserve role keeps him inside the Red Bull system as Racing Bulls retain Arvid Lindblad and Liam Lawson for 2027.

What to watch: Tsolov is expected to continue testing for the Red Bull junior team, per a post from the @tsolovfiles account.