[8][9] Troicki was born on 10 February 1986 in Belgrade, SR Serbia, SFR Yugoslavia, to Aleksandar, a lawyer, and Mila, an economist.

3 and fellow countryman Novak Djokovic in the second round 2–6, 6–4, 7–5,[15] before eventually losing to Romanian Andrei Pavel in the semifinals.

He then represented Serbia in the Davis Cup against Russia, losing to Nikolay Davydenko 1–6, 6–1, 3–6, 6–1, 2–6, and defeating Dmitry Tursunov 7–6, 4–6, 6–3.

In the French Open, he lost to fifth seed and eventual semifinalist Juan Martín del Potro in the second round 3–6, 5–7, 0–6,[20] after defeating Łukasz Kubot in a tight five-setter 3–6, 6–3, 6–4, 6–7, 6–3.

He then competed in the German Open in Hamburg, losing to eventual finalist Paul-Henri Mathieu 0–3 ret., in the quarterfinals due to a foot injury he suffered when he fell hard in the start of the match.

He then competed in the Shanghai ATP Masters 1000, where he lost to eighth seed Gilles Simon, 3–6, 4–6, after defeating Juan Mónaco 6–1, 6–2, in the first round.

He played his last tournament in the BNP Paribas Masters, losing in the second round to Radek Štěpánek 4–6, 2–6, after defeating Paul-Henri Mathieu 7–6, 3–0 ret.

Troicki began the year by competing in the Qatar Open as the fifth seed, where he advanced to the semifinals after defeating Daniel Gimeno Traver 6–1, 7–5, Olivier Rochus 6–2, 6–2, and Łukasz Kubot 4–6, 6–4, 7–6, but lost to Rafael Nadal 1–6, 3–6.

He then retired against Jürgen Melzer in the first round of the ABN AMRO World Tennis Tournament due to an elbow injury, being 3–6, 0–3 down.

At the start of the clay season, Troicki competed in the Monte-Carlo Masters, losing to 12th seed Tommy Robredo in the second round, after defeating Łukasz Kubot 4–6, 6–2, 6–2.

Troicki advanced to the finals of the Sydney International, where he defeated Juan Ignacio Chela, Richard Gasquet, and Florian Mayer, before losing to Gilles Simon 5–7, 6–7.

Then at the Australian Open, he reached the third round for the first time, but retired against compatriot and eventual champion Novak Djokovic due to stomach pain after losing the first set 2–6.

He next played at the ABN AMRO World Tennis Tournament and reached the semifinals without dropping a set, but fell to Robin Söderling 5–7, 4–6.

At the French Open, Troicki reached his first Grand Slam fourth round with wins over Julian Reister, Tobias Kamke, and Alexandr Dolgopolov.

At the Gerry Weber Open, Troicki defeated Mischa Zverev and Igor Andreev, before losing to Tomáš Berdych 6–7, 1–6, in the quarterfinal.

At the Legg Mason Tennis Classic, Troicki reached the quarterfinals, defeating Ryan Harrison and Kevin Anderson, but lost to John Isner 6–7, 6–3, 1–6.

Next, Troicki played at the Rogers Cup, defeating Michael Yani 2–6, 6–3, 6–1, and John Isner 6–4, 3–6, 6–2, before losing to Gaël Monfils 6–3, 6–7, 6–7, in the third round.

Troicki won the Boodles Challenge, a warm-up to Wimbledon exhibition, defeating Robin Haase 7–5, 6–4 in the final.

On 25 July 2013, Troicki was banned from playing tennis for 18 months, for failing to provide a blood sample at the Monte-Carlo Masters event.

"[24] After serving his doping suspension, Troicki made his return to professional tennis at the Swiss Open, an ATP 250 event in Gstaad, receiving a wildcard into the main draw.

He spent the next couple of months on the Challenger Tour, a period in which he won titles in Como, Italy and Banja Luka, Bosnia & Herzegovina.

In the first ATP final in history featuring two qualifiers, Troicki dispatched Kukushkin in 64 minutes after breaking the Kazakh twice in each set.

[26] In March, Troicki defeated young Croatian prodigy Borna Ćorić in five epic sets in round one of the Davis Cup; Serbia would go on to win and progress to the quarterfinals.

At the French Open, he made it to fourth round where he lost to the defending champion Stan Wawrinka 7–6, 6–7, 6–3, 6–2 after three hours of play.

After that two solid wins at the first round of the Davis Cup ensured Serbia would reached the quarterfinals for the seventh time in eight years.

In doubles, partnering Jan-Lennard Struff he reached the finals of Sydney International where they lost to Łukasz Kubot and Marcelo Melo.

During summer, Troicki tested positive for COVID-19, which affected his preparations for the restart of the tennis season due to pandemic.

[29] At the beginning of 2021, he qualified for the Australian Open main singles draw where he lost in the first round to Michael Mmoh in 5 tight sets.

After failing to qualify for the main draw of Roland Garros he made a surprising run at Queen's Club by beating No.

Active players are in boldface: • Record of consecutive five-set Grand Slam matches In May 2008, 22-year-old Troicki began dating model Sunčica Travica, one year his senior, having met her in Paris while competing at Roland Garros.