[15] In January 2017, Kecmanović won his first singles ITF pro circuit title in Sunrise, Florida, US.

[16] In March, he received a wild card entry for the qualifying draw at Miami Masters and defeated 22nd seed and world No.

117 Henri Laaksonen in straight sets in the first round, before losing the deciding qualifying match to 11th seed and world No.

Between May and July, Kecmanović played in four futures tournaments in Turkey and Belgium, respectively, winning two and reaching another final and one semifinal.

After reaching two quarterfinals in three challengers to start the season, Kecmanović broke into the top 200 for the first time in his career on 5 February, when he was ranked 194th on the ATP list.

In March, he made his ATP main draw debut when he was granted wild card for Miami Masters, losing to Denis Istomin in the first round.

In July and August, Kecmanović played World TeamTennis league and helped Springfield Lasers win its first ever championship after losing five times in the finals between 1999 and 2014.

[22] In Miami, he beat former top-10 player Ernests Gulbis in the first round before losing to Frances Tiafoe in two tiebreak sets.

At the French Open, Kecmanović played in the main draw, beating Denis Kudla in five sets before losing to David Goffin, his first Grand Slam win.

[25] At the Citi DC Open, he beat Alexei Popyrin and Pierre-Hugues Herbert before losing to Norbert Gombos.

[27] In September, he won his first ATP title at the Austrian Open Kitzbühel by beating Yannick Hanfmann in straight sets in the final.

[32] Next he defeated Tommy Paul in straight sets and Lorenzo Sonego to make his first fourth round at a Major, which is his best result at a Grand Slam.

[33] He lost to Francisco Cerúndolo in a second consecutive match, the first loss coming at the previous tournament, the 2022 Argentina Open.

In February, Kecmanovic, as the fourth seed, reached his first final of the year at Delray Beach Open with wins over Nuno Borges and Marcos Giron, both in straight sets, and in the semifinals he scored his 100th ATP tour victory by defeating Radu Albot.

[38] In Estoril he reached his second final of the season defeating Luca Nardi, Jurij Rodionov, Bernabé Zapata Miralles and Marco Cecchinato before losing to top seed Casper Ruud.

He defeated Dominic Stricker in the second round, Zizou Bergs in the quarterfinals, before losing to Albert Ramos Viñolas in the semifinals.

[42] In September, during the Davis Cup Finals in Valencia, Kecmanovic was paired in doubles with Nikola Ćaćić and it was Serbian Davis Cup team that emerged victorious against South Korean pair Song Min-kyu and Nam Ji-sung, same duo they fell to last year.

[45] In October, Kecmanovic reached the semifinals of the Stockholm Open, defeating Karl Friberg in the first round, top seed and defending champion Holger Rune in the second and Elias Ymer in the quarterfinals, all in straight sets.

[49] In doubles, he teammed up with Brandon Nakashima to win a title in a three set match against American duo Christian Harrison and Evan King.

He is also the first Serbian to claim both titles at the same ATP Tour event and the first overall since Australian Jordan Thompson achieved the feat in Los Cabos (2024).

[50] Born in Belgrade, to Dragutin Kecmanović and Maja Pavlov, both doctors, specialists in general and abdominal surgery.

[51] Miomir began playing tennis at the age of 6 with his maternal grandfather, Jovan Pavlov, who was a General in Yugoslav People's Army.