Despite a guaranteed 75 minutes of track time, most drivers remained on pitlane after their installation laps since they were yearning for another set of tyres. The teams were granted their practice Firestone alternates for this session, rather than second practice, but the drivers wanted rubber laid down to be most representative of the expected track conditions in qualifying tomorrow.
On primary tyres, Romain Grosjean of Andretti Autosport was the first to crack the 1m47s barrier with a 1m46.9302s, but team-mates Alexander Rossi and Colton Herta eclipsed him by over two-tenths of a second.
