Heavy rain in Italy meant the GP3 Series could only fit in Friday’s practice session and one race on Sunday.
Jack ended Friday in fourth place just 0.192s down on team-mate Nirei Fukuzumi.
And that would be Jack’s starting position for Sunday’s delayed race after torrential rain halted Saturday’s running which put an end to qualifying and race two which was originally scheduled for Sunday morning.
A clean start saw Jack in third and in the mix for the lead with his two ART team-mates. The 21-year-old eventually took the lead on lap 15 with an impressive launch at the end of the Virtual Safety Car to go from third to first on the start-finish straight.
Jack held onto his advantage for a lap before Russell retook the lead into the first Lesmo right-hander. Jack fought hard with his compatriot weaving and blocking to break the tow meaning he had to settle for second - his fifth podium of the season.
Jack trails Russell by 43 points at the top of the Drivers’ Standings with the next round taking place in Jerez in October.
Jack Aitken (ART, #1)
2nd – 119 points – 11/16 races completed
"It was a strange weekend that involved a lot of waiting around ! It was a shame that Saturday was washed out, so qualifying and race two were cancelled, but race one was a lot of fun. I started fourth and made it up to third immediately when Fukuzumi couldn’t start. After sitting back for a while, I got a great VSC restart and went from third to first ! I struggled a bit with understeer after that, so could only get second, but I’m still in the championship hunt."
Next Round : Jerez, Spain (6-8 October)