Haverkort started karting in 2011. His major karting highlights included 2nd in the WSK Final Cup - OK, 1st in the 2017 German Junior Kart Championship, 3rd in the CIK-FIA Karting Academy Trophy in 2016, 2nd in the 2013 Chrono Karting Winter Series, 1st in the 2012 Chrono Rotax Max Winter Cup Micromax and 3rd in the 2012 Chrono Dutch Rotax Max Challenge - Micromax.
Lower formulae
In 2020 Haverkort made his car racing debut in the F4 Spanish Championship with MP Motorsport.[1] He dominated the championship, taking 13 victories and a total of 17 podium finishes from 21 races. The Dutchman finished 111 points ahead of teammate Mari Boya and took the title during the penultimate round of the campaign at Jarama, having won all three races of the weekend.[2]
Formula Renault Eurocup
Haverkort made some appearances in Formula Renault as a guest driver for rounds 6 and 7 with MP Motorsport.[3] In his first Qualifying session he set the 8th fastest time at Catalunya he finished the first race 9th and the second race 5th. At Spa he finished 5th in both races. Kas was ineligible for points as he was a guest driver.
Formula Regional European Championship
2021
In December 2020 Haverkort did the group test at Paul Ricard for MP Motorsport. Three months later the team announced that he would be driving for them in the 2021 Formula Regional European Championship, partnering Franco Colapinto and fellow F4 graduate Oliver Goethe.[4] His first points finish came in the fourth round of the season when he ended up seventh at Le Castellet, and he followed that up with a sixth place at his home race in Zanvoort. The Dutchman went scoreless for the next three events, but he would finish in the points on three occasions in the final four races, getting a season-best fourth in Monza.[5] Haverkort ended his season in 16th place with a total of 35 points.