Manor Racing's Rio Haryanto was the surprise pace-setter in today's GP3 Series practice session at Istanbul.
Haryanto waited until the final seconds to produce his 1m48.022s effort, putting him just 0.047sec clear of previous leader Esteban Gutierrez of ART, and then spun and stalled at the first corner immediately after setting his time. Gutierrez hung on for second ahead of Renger van der Zande (Mucke Motorsport), Nigel Melker (Mucke Motorsport) and Michael Christensen (MW Arden).
Prior to Gutierrez establishing himself at the top, six other drivers had taken turns to lead the times during a frantic opening 10 minutes, including Melker, Daniel Morad, Doru Sechelariu and Pablo Sanchez-Lopez.
Stefano Coletti, who is making his series debut this weekend with Tech 1, hovered on the fringes of the top 10 early in the session before eventually ending up 16th, with fellow newcomers Jim Pla (Tech 1) 19th and Mikhail Aleshin (Carlin) 24th.