Ernesto Viso scored his and iSport's first ever GP2 win in a thrilling sprint race at Imola.
Viso had to fight his way by the BCN cars of Hiro Yoshimoto and Timo Glock - and then hold off a concerted attack from championship leader Nelson Piquet Jr - to score a memorable win.
The race started in chaotic fashion, with Lucas di Grassi smashing into the rear of Adrian Valles's stalled car.
As the safety car was deployed, and the field slowed, Arden's Michael Ammermuller was caught unaware and thumped into Alex Premat, destroying the rear of the ART car.
When the action finally resumed, the BCN pair led, but Viso got a run on Glock and passed the German after three corners running side by side.
Viso then hunted down Yoshimoto, but the Japanese was defending hard. He finally had to yield when Viso forced his way through at the final chicane.
This also gave Piquet a sniff of second, and he pounced to set up a great race for the win. The pair were the quickest two cars in the field and they traded fastest laps, but Piquet never got quite close enough to try for a pass.
Yoshimoto held third, while Glock drove defensively throughout to fend off Nicolas Lapierre. In the dying stages, Lapierre finally made an error as he searched for a way by, handing fifth to Luca Filippi and sixth to Felix Porteiro. It was the first GP2 points for both drivers.
Trident's Andreas Zuber finished eighth, followed by Ferdinando Monfardini in ninth. Lewis Hamilton took 10th after starting dead last, while Alexandre Negrao and Adam Carroll were 11th and 12th respectively.
CLASSIFIED: Pos Driver Team Time 1. Viso iSport International 45:17.116 2. Piquet Jr. Piquet Sports + 0.596 3. Yoshimoto BCN Competicion + 25.001 4. Glock BCN Competicion + 28.901 5. Filippi FMS International + 29.278 6. Porteiro Campos Racing + 30.351 7. Lapierre Arden International + 31.502 8. Zuber Trident Racing + 31.809 9. Monfardini DAMS + 32.449 10. Hamilton ART Grand Prix + 33.366 11. Negrao Piquet Sports + 35.826 12. Carroll Racing Engineering + 39.654 13. Hernandez Durango + 40.089 14. Perera DAMS + 40.399 15. Fauzy Super Nova International + 41.753 16. Piccione DPR + 43.206 17. Gommendy iSport International + 49.138 18. Villa Racing Engineering + 65.304 19. Lopez Super Nova International + 2 laps 20. Pla DPR + 2 laps NOT CLASSIFIED: Driver Team Laps Tahinci FMS International 19 Bruni Trident Racing 12 Ammermueller Arden International 1 Premat ART Grand Prix 0 Valles Campos Racing 0 Di Grassi Durango 0 Fastest lap: Viso, 1:34.431 on lap 24 Championship standings after round 2 (race 4): Drivers: Teams: 1. Piquet Jr. 25 1. Arden International 32 2. Bruni 18 2. Piquet Sports 25 3. Viso 16 3. Trident Racing 18 = Ammermueller 16 4. iSport International 16 = Lapierre 16 5. ART Grand Prix 14 6. Hamilton 9 6. BCN Competicion 10 7. Valles 6 7. Campos Racing 7 8. Yoshimoto 5 8. Super Nova International 4 = Glock 5 9. FMS International 2 = Premat 5 11. Lopez 4 12. Filippi 2 13. Porteiro 1