Maini started from P3 on the grid on prime tyres and held on to his position for several laps while Arthur Leclerc was right behind him putting pressure on the softer tyres.
The 23-year-old Jehan Daruvala, who is currently in his third season in Formula 2, will be driving McLaren MCL35 on June 21 and 22 at Silverstone in the United Kingdom.