Tonut came through the youth ranks of Monfalcone and Pallacanestro Trieste, before transferring again to Monfalcone, where he made his debut for the club’s men’s team in the amateur Italian third division during the 2010–11 campaign.
Tonut later returned to Pallacanestro Trieste where he played for the first time in the Serie A2 during the 2012-13 season. During the next two seasons, he was ranked as the fourth-best scorer in the league and the best Italian player of Serie A2 with averaging 19.2 points per game.
Tonut then joined Reyer Venezia of the professional Italian top-flight level league LBA in July 2015. In his first season with the team, he saw the court in 34 games in the LBA, scoring 2.8 points per outing. In the 2015–16 season, he marked his debut on the European club stage, participating in the European second tierEuroCup competition with Venezia.
In 2017 and 2019, Tonut won the LBA championship with Reyer.
In the 2020–21 season, Tonut won the LBA Most Valuable Player Award after averaging 15.6 points, 3.9 rebounds and 2.9 assists.[1]
