Lendoudis made his known racing debut in 2014, driving in a round of the Ferrari Challenge Europe as well as the end-of-year Finali Mondiali race. He embarked on a full-time campaign in the series with AF Corse in 2015, finishing 17th in the Coppa Shell class. The Greek driver scored his first podium in the series in 2016 and ended up 11th overall. After winning the Group C Racing competition — a series for historic cars — in the C1 class during the 2017 season, Lendoudis made a switch to GT3 machinery the following year by competing for Black Falcon in the Pro-Am category of the Blancpain GT Series Endurance Cup.[3] He, Rui Águas, and Saud Al Faisal took a subclass podium at Le Castellet and finished fifth in the Pro-Am championship. Lendoudis continued to race and win in historic competitions during 2018 and 2019 and made his debut in the Le Mans Cup during the latter year, driving in the 24 Hours of Le Mans support race called Road to Le Mans.[4]
After a year of absence during the COVID-19 pandemic, Lendoudis entered into the LMP3 prototype class of the Le Mans Cup in 2021, partnering Águas at AF Corse.[5] They scored a best finish of eighth and finished 19th in the teams' standings. The pair returned in 2022 but failed to score any points during their four races.[6]
Lendoudis and Águas moved to the European Le Mans Series in 2023, entering the final year of the LMGTE class at AF Corse alongside Ulysse de Pauw.[7] Though the trio finished all but one race in the points, their efforts were only enough for eighth place in the teams' championship. For the 2024 ELMS season, Lendoudis moved up to the LMP2 class with Algarve Pro Racing, racing in the Pro-Am category together with former Le Mans class winner Richard Bradley and young pro Alex Quinn.[8][9] After two races where they finished off the podium, the #20 APR trio benefited from good strategy at Imola to take victory.[10] With Lendoudis remaining clean throughout the next few races, the team extended their podium streak by finishing third at Spa and second at Mugello to set up a final-round title decider.[11] The team decided to gamble during the final stint, leaving Quinn out of the pits and forcing him to stretch his fuel all the way to the end. They led the race until the final lap, when a slowing Quinn was eventually caught by Bent Viscaal, demoting the #20 APR crew to second in the race and the Pro-Am championship.[12][13]