Proton Competition's Wolf Henzler was the fastest in the GTE class in the opening European Le Mans Series practice session at the Estoril Circuit.
The German ace set a best time 1:40.165 at the wheel of the #77 Porsche 911 RSR. He shared the car with team-mates Mike Hedlund and Marco Seefried.
The ninty-minute session was highlighted by multiple incidents and was red flagged with twenty minutes to go.
Beechdean AMR was fourth with the #99 Aston Martin Vantage GTE. The AF Corse #55 Ferrari 458 Italia was fifth.
GTE points leaders from JMW Motorsport were sixth with the #66 Ferrari 458 Italia. The Proton Competition #88 Porsche 911 RSR was seventh. The Formula Racing #60 Ferrari 458 Italia was eight.
Estoril First Practice Results
Action at Estoril will resume on Saturday with a second ninty-minute practice session followed by the ten-minute qualfying one.