Having played with his compatriots, including Marko Djokovic, Ilija Bozoljac and Dušan Lajović, he has taken part in three ATP World Tour main doubles tournaments held in Belgrade (in 2010 and 2012) and Umag (in 2012), where he lost in the opening rounds.

In the summer of 2014, after a series of successful appearances in Challenger tournaments played on a clay surface, Ćaćić moved into the top 300 and achieved his career-high ATP singles ranking of No.

Later that year, he won his first ATP tour level doubles title with his compatriot Dušan Lajović at the Chengdu Open, defeating Jonathan Erlich and Fabrice Martin, 7–6(11–9), 3–6, [10–3].

The pair also reached the quarterfinals of the 2021 French Open for their best showing in their careers, defeating Marcel Granollers/Horacio Zeballos and Máximo González/Simone Bolelli en route.

He reached the quarterfinals at the 2022 Mutua Madrid Open with partner Brkic, losing to eventual champions Wesley Koolhof and Neal Skupski.

In April, partnering Miomir Kecmanović, Cacic reached the final of the 2023 Estoril Open, losing to Sander Gillé and Joran Vliegen.

[5] In October, again partnering Victor Vlad Cornea in Basel as a lucky loser pair, they reached the quarterfinals by defeating Swiss duo Mika Brunold and Marc-Andrea Hüsler in straight sets.