Rodin Motorsport's newly crowned champion Alex Ninovic topped the times in both GB3 Championship test sessions at Monza on Thursday.
The Australian recorded a best lap of 1m43.573s around the legendary Italian venue in the first session, and a 1m43.726s in the second test at the end of the day.
Ninovic ended the day just 0.064s clear of JHR Developments' Noah Lisle, with Xcel Motorsport's Kabir Anurag completing the top-three ahead of his second weekend in the championship.
VRD's Enzo Tarnvanichkul was fourth quickest, with the lead quartet all registering their best times in the first session of the day.
Hitech's Deagen Fairclough improved his session one time by 0.167s in the second test to climb to fifth overall on the combined times, ahead of Argenti with Prema's Reza Seewooruthun, who was sixth quickest courtesy of his session one effort.
The remainder of the top-10 all set their best times in the second session, with Xcel's Jack Sherwood just 0.006s quicker than Hitech's Keanu Al Azhari in eighth. Rodin's Gianmarco Pradel and Xcel's Patrick Heuzenroeder completed the top-10, which was covered by just 0.538 seconds.
The top-15 drivers were covered by less than a second, with Hillspeed's Zhenrui Chi the quickest newcomer in 15th. His teammate Maxim Rehm was just behind in 16th, while GB4 runner-up Isaac Phelps was 20th as he gears up for his maiden GB3 event for Elite Motorsport.
Testing at Monza resumes tomorrow with two 45-minute sessions, the first starting at 09.00.
GB3 Championship, partnered by the BRDC, Autodromo Nazionale Monza Thursday test combined result:
1. Alex Ninovic, Rodin Motorsport, 1m45.573s
2. Noah Lisle, JHR Developments, +0.064s
3. Kabir Anurag, Xcel Motorsport, +0.208s
4. Enzo Tarnvanichkul, VRD Racing, +0.364s
5. Deagen Fairclough, Hitech TGR, +0.381s
6. Reza Seewooruthun, Argenti with Prema, +0.413s
7. Jack Sherwood, Xcel Motorsport, +0.508s
8. Keanu Al Azhari, Hitech TGR, +0.514s
9. Gianmarco Pradel, Rodin Motorsport, +0.536s
10. Patrick Heuzenroeder, Xcel Motorsport, +0.538s
11. Bart Harrison, JHR Developments, +0.669s
12. Abbi Pulling, Rodin Motorsport, +0.756s
13. Lucas Fluxa, Hillspeed, +0.771s
14. Kai Daryanani, JHR Developments, +0.945s
15. Zhenrui Chi, Hillspeed, +0.945s
16. Maxim Rehm, Hillspeed, +1.036s
17. Flynn Jackes, Elite Motorsport, +1.259s
18. August Raber, Argenti with Prema, +1.752s
19. Patricio Gonzalez, VRD Racing, +1.786s
20. Isaac Phelps, Elite Motorsport, +1.831s
21. Rodrigo Gonzalez, VRD Racing, +2.169s
22. Bianca Bustamante, Elite Motorsport, +2.222s
Click here for full session one result
Click here for full session two result