Jolyon Palmer made it a special weekend for Carleton Rode's Isport as the GP2 outfit earned a sprint race victory at Monaco's iconic track.

The son of former F1 driver and Snetterton owner Jonathan bagged the team's first win of the season in the Formula One feeder series on Sunday – off the back of a feature race podium for team-mate Marcus Ericsson, who finished second on Saturday.

Palmer kept his nose clean – there were plenty ahead who didn't – to lead Isport home ahead of Max Chilton, followed by Giedo van der Garde for Hingham's Caterham Racing.

'I got off to an awesome start to jump into the lead, and after the safety car I was able to build a good lead,' said Palmer. 'Then I just managed the gap to Max without taking any risks.

'I have to say a big thank you to Isport for all their hard work after an unlucky start to the season. Hopefully now we can carry this momentum through to the next rounds at Valencia and be fighting at the front again.'

Team principal Paul Jackson added: 'Another good day for the team as Jolyon claimed his first GP2 win and Marcus came from seventh through to fourth. This weekend has really kick started our season and given everybody a boost.

'It is a very special occasion for Jolyon, and confirms the huge progress he has made and his growing stature as a real contender.

'Marcus has also shown that without bad luck or stupid incidents, he is back at the front where he belongs.'

Van der Garde – feature race winner in Barcelona – was actually third in both Monaco races while his team-mate, Attleborough's Venezuelan racer Rodolfo Gonzalez, was an excellent fifth on Sunday.

James Calado picked up Lotus-backed ART's best results of the weekend with second and fourth on Saturday and Sunday respectively.

Van der Garde is third in the championship standings behind the Dams of Davide Valsecchi and second-placed Luiz Razia for Arden – both coincidentally were racing for Caterham last year.

Lotus GP are second in the team championship behind Dams, with Caterham fifth and Isport seventh.

The GP2 paddock next rejoins F1 for the European Grand Prix in Valencia at the end of June.