Joran Vliegen (born 7 July 1993) is a Belgian professional tennis player who specializes in doubles.

In the quarterfinals against the United States, he and fellow Belgian Sander Gillé lost against Ryan Harrison and Jack Sock.

[5] At Wimbledon 2019, Vliegen made his debut in a mixed doubles event, and reached the third round with Zheng Saisai from China.

[8] Vliegen won his first ATP Tour doubles title at the 2019 Swedish Open with fellow Belgian Sander Gillé.

[10] The duo continued their winning streak by reaching the final of the Austrian Open, losing to Philipp Oswald and Filip Polášek.

At the 2022 French Open, Vliegen and Gillé caused an upset by eliminating the defending champions and home favorites Pierre Hugues Herbert and Nicolas Mahut in three tight sets without dropping one service game.

In the second round they progressed past the home team of Clara Burel and Hugo Gaston in straight sets.

[12] Their semifinal followed a similar pattern, this time against 2018 Wimbledon champion Nicole Melichar and twice French Open Men's doubles champion Kevin Krawietz, with them again bouncing back from a poor first set to win the second in the tie-break and the third set match tie-break to reach their first Grand Slam final.

[13][14] This made Vliegen the first Belgian man to reach the final of a mixed doubles event of a Grand Slam tournament.

At the 2024 Monte-Carlo Masters with Gille, they defeated wildcard pair of Jannik Sinner and Lorenzo Sonego, defending champions and second seeds Austin Krajicek and Ivan Dodig in the second round, and sixth seeds Tim Pütz and Kevin Krawietz to reach the semifinals.