Deletraz has been team-mates with ex-Formula 1 driver Kubica since 2021, when he moved full-time into endurance racing after making select GT World Challenge Europe outings and finishing fourth in a Le Mans one-off with Rebellion in 2020.
Together, the Swiss and the 2008 Canadian Grand Prix winner claimed the 2021 European Le Mans Series crown with WRT and were only denied victory at Le Mans by a freak failure on the final lap.
They continued with Prema for the 2022 WEC, finishing second at Le Mans, and upon reverting back to WRT repeated the result earlier this month after losing out to Polish squad Inter Europol Competition by just 21 seconds.
Speaking to Autosport, two-time European Le Mans Series champion Deletraz said his partnership with Kubica had been instrumental in helping him reach the point of earning a first manufacturer deal as an endurance extra for Acura squad Wayne Taylor Racing with Andretti Autosport in the IMSA SportsCar Championship.
"I’ve evolved a lot because meeting Robert in ’21, yes he’s a friend, but he taught me so much," said Deletraz, who currently leads the WEC P2 standings with Kubica and Rui Andrade.
"He’s I think a legend of the sport. Technically speaking, there is no drivers I have met that are as strong as him.
"Being by his side, seeing how he works, understanding a car and how to make it fast - in the last two and a half years I went from probably knowing 20 per cent to maybe 90 per cent of the game.
"Technically speaking he’s been an amazing teacher and I wouldn’t be here without him."
Source: Autosport