セオドール
Two 45-minute practice sessions were held before the race on Sunday: one on Thursday morning and one on Friday morning. Alex Lynn set the fastest time for Theodore Racing by Prema in the opening practice session—held in variable weather conditions—with a lap of 2 minutes, 14.495 seconds, 0.061 seconds faster than any one else. His closest challenger was Félix da Costa in second in front of third-placed Coletti and Mücke Motorsport's Felix Rosenqvist in fourth position. Alexander Sims, Jaafar, Tom Blomqvist, Marciello, Lucas Auer and Korjus rounded out the session's top ten drivers. Sainz was the first driver to go off the slippery track and ricocheted off the Fisherman's Corner barrier with his car's rear. His teammate King understeered into the same barrier 11 minutes later, while Rosenqvist ran wide on dirty tyres at Lisboa turn and crashed at San Francisco Bend. Three other drivers—Sekiguchi, Lucas Wolf and Sun Zheng—failed to record a lap time by encountering incidents during the session.