アレクサンダル・コバチェビッチ

2021: Turned Pro, Grand Slam qualifying debut

Kovacevic made his Grand Slam qualifying debut at the US Open, where he advanced to the final round before falling to Argentine Marco Trungelliti.

2022: ATP debut, first win and semifinal, Top 200

Kovacevic made his Top 250 debut on July 25, 2022, as world No. 227 following a final showing at the 2022 Indy Challenger.

Kovacevic made his ATP main draw debut at the 2022 Korea Open, where he entered as a lucky loser. He recorded his first ATP tour level win by defeating Miomir Kecmanović in the first round. Next he defeated Tseng Chun-hsin to reach his first ATP quarterfinal and Mackenzie McDonald to reach his first ATP semifinal. As a result, he climbed 55 positions and reached No. 167 on October 3, 2022.

2023: First Challenger win, Major and Masters debuts, top 125

He reached the top 125 on 6 February 2023, following his first Challenger title at the 2023 Cleveland Open. At the 2023 Delray Beach Open, he received a wildcard for his second ATP tour event, losing in the first round to Michael Mmoh.

In March, he won his second Challenger title at the 2023 Texas Tennis Classic in Waco, Texas as a wildcard. He made his Masters 1000 debut at the 2023 BNP Paribas Open as a wildcard. He reached the main draw at the 2023 Miami Open as a lucky loser and recorded his first Masters win against Jaume Munar.

He entered the 2023 U.S. Men's Clay Court Championships as a direct entry. He was accepted as a direct entry at the 2023 French Open, making his Grand Slam debut where he played Novak Djokovic. He defeated qualifier Omni Kumar and then world No. 13 Cameron Norrie in the second round of the 2023 Los Cabos Open for the biggest win of his career, to reach the quarterfinals, where he lost to Dominik Koepfer.

He qualified at the Masters 1000 at the 2023 Rolex Shanghai Masters on his debut but lost to Cristian Garín. He won his third Challenger title at the 2023 Shenzhen Longhua Open, defeating Nuno Borges. He also reached the semifinals at the new 2023 Shenzhen Luohu Challenger but lost after a walkover.

2024: Australian Open debut and first Major win, top 85

He qualified for the 2024 Australian Open making his debut at this Major and recorded his first win in five sets over Alejandro Tabilo. As a result he moved into the top 85 in the rankings.

He entered the 2024 Delray Beach Open as a wildcard and the following week qualified for the 2024 Los Cabos Open where in the latter, he reached back-to-back quarterfinals at this tournament. He also qualified for his first ATP 500 tournament, the 2024 Abierto Mexicano Telcel and defeated Los Cabos champion, Australian Jordan Thompson.

He also received a wildcard for the 2024 BNP Paribas Open. At the next Masters, the 2024 Miami Open, he reached the main draw after qualifying.

At the 2024 U.S. Men's Clay Court Championships, he recorded his first victory on clay in 3 hours and 16 minutes, the longest first round and tied for second-longest recorded match in the Houston tournament history, over another Australian Thanasi Kokkinakis. In the next round he lost in three sets to another Australian, sixth seed Jordan Thompson in the longest recorded match in the tournament history lasting 3 hours and 34 minutes, with two tiebreaks in the last two sets.