His best result in the World Drivers' Championship was sixth place in 2004, also the year in which he scored his sole victory at the Monaco Grand Prix.

Throughout his Formula One career, Trulli was renowned for his skill in qualifying, regularly achieving far better grid positions than rivals with superior cars to his own.

His parents were motorsport fans and named their son after Jarno Saarinen, the Finnish Grand Prix motorcycle racing champion who was killed at Monza in 1973.

[4] He stayed at the Prost team for the next two seasons and eventually scored his first podium in wet conditions at the 1999 European Grand Prix.

[5] However, this was a rare highlight in a race few of the main front-runners finished, and the poor performance of the Prost team convinced him that a switch to Jordan would bring improved results.

During this period suggestions were made that Trulli was more of a qualifying specialist than an out-and-out fast race driver, a charge he frequently denied.

Regardless of Button's improved pace that season, it was Trulli who stayed at Renault for 2003 to partner promoted test-driver Fernando Alonso.

A last corner error which allowed Ferrari's Rubens Barrichello onto the podium in France enraged the team,[14] and from that point his days with the French manufacturer were numbered.

[15] He was sacked three races before the end of the season and replaced by 1997 World Champion Jacques Villeneuve, despite leading his teammate in the championship at that point.

[16] Trulli had already agreed to drive for Toyota in 2005, and his early exit from Renault allowed him to take up his new seat for the last two races of the 2004 season, replacing Ricardo Zonta.

[19] For the vast majority of the year he outpaced his highly paid teammate Ralf Schumacher, but a late season dip in form saw him slip to seventh in the championship, two points behind the German.

[21] He seemed to be outpaced by teammate Ralf Schumacher more often than not, but finally scored his first points of the season when he raced to 6th from 4th on the grid at the Canadian Grand Prix.

[22] Trulli was racing very well in the season finale at Interlagos, but his car suffered suspension failure in the first 10 laps, a fate which befell his teammate at the same time.

[24] A couple more points followed in Bahrain,[25] but he stalled on the grid at the start of the Spanish Grand Prix and dropped out during the early laps due to mechanical failure.

[29] He also qualified well for the French Grand Prix but crashed with the Renault of Heikki Kovalainen on the opening lap, and duly retired because of the damage.

[37] He then topped that in France by finishing on the podium in 3rd place, holding off the challenge of Heikki Kovalainen and Robert Kubica in the closing laps.

His teammate Glock played a pivotal part in the title outcome as he was passed by Hamilton on the last corner of the race, which gave the Englishman the championship by one point from Massa, who won easily.

[43] Although Trulli started from the pit lane, he finished in an impressive 3rd place before being penalised 25 seconds, dropping him to 12th position for passing Lewis Hamilton under the safety car.

[46] At the Bahrain Grand Prix, Trulli qualified on pole position[47] but due to an unconventional tyre strategy, he finished third.

[49] He crashed out of the Spanish Grand Prix after being forced off the track at the second corner and being collected by Adrian Sutil,[50] and then had a poor performance in Monaco as the Toyotas qualified on the back row of the grid.

[52] Trulli then fought back at the Japanese Grand Prix – which would prove to be Toyota's last home race – by qualifying and finishing second.

A ring around the blue circle was incorporated when he raced at Jordan and Renault, being coloured after the team's main sponsor.

[80] His son Enzo is also pursuing career in motorsports he competed in the WSK karting series,[81] before starting single seater racing in F4 UAE in 2021, and for 2022 at present in FIA Formula 3 Championship.