Having a good coach is integral to a player’s success on the ATP Tour, but it’s not easy to make the right call.
This year alone, we’ve seen several big names make coaching changes as they look to achieve their goals on the ATP Tour.
After hiring the three-time Grand Slam winner ahead of the 2025 season, Novak Djokovic split with Andy Murray after a series of poor results on the clay.
Another player who made a change this year was Stefanos Tsitsipas, who brought in Goran Ivanisevic ahead of the grass-court season, although their relationship was short-lived as they parted ways having won just one of their three matches together.
Both Murray and Ivanisevic are good coaches in their own right, but one coach stands above the rest as the greatest of all time, someone any player would be lucky to have on their team.
Marian Vajda: The most successful coach in tennis history
Slovakia’s Marian Vajda began his coaching career in 1995, working with his nation’s Davis Cup and Federation Cup teams.
He made his ATP Tour coaching debut in 2001, guiding his countryman Karol Kucera to his sixth and final tour-level title at the 2003 Copenhagen Open.
Following Kucera’s retirement in 2005, Vajda joined Djokovic’s team, and so began one of the most legendary partnerships in the history of the sport.
Between 2006 and 2017, Vajda and Djokovic won 12 Grand Slam titles together, a remarkable tally.
However, as Djokovic struggled to replicate the level he’d shown over the previous decade in 2017, he made a change, replacing Vajda with eight-time major champion Andre Agassi.
Their partnership didn’t last long, as Vajda was brought back into the fold ahead of the 2018 Monte-Carlo Masters.
Djokovic soon returned to winning ways, picking up eight more major titles before a second and final split with Vajda in 2022.
Speaking to Tennis Majors shortly after their split, Vajda shared his thoughts on the end of their partnership.
“It was a combination of various reasons: we have been together for a really long time, and his decisions showed that he wanted to focus on Grand Slam tournaments – that is why he might think that it is not ideal to have so many people in his team. He wanted to reduce it and have only one coach,” he said.
“I don’t know for sure, because I never asked him, but I assume from my analysis of his tournament schedule that he wanted to reduce his team, and he chose Goran Ivanisevic.
“It did not make sense for a coach to coach him only for Grand Slams, because a coach needs a long-term plan.
“Novak [Djokovic] and me are still friends; it was an amicable split.”
To this day, Vajda remains the most successful coach in tennis history, having taken the title from Rafael Nadal’s coach Toni Nadal in 2020.
- Marian Vajda – 20 Grand Slams
- Toni Nadal – 16 Grand Slams
Vajda didn’t wait long before returning to coaching, as he partnered up with Slovakia’s Alex Molcan in 2022.
Under the guidance of Vajda, Molcan reached his third tour-level final at the 2022 Lyon Open, the third round of Wimbledon for the first time in 2022, and qualified for the biggest semifinal of his career at the 2022 Hamburg Open.
However, as Molcan struggled for consistency, the pair parted ways in 2023, and Vajda hasn’t been seen on tour since.
Working with Kucera, Djokovic, and Molcan, Vajda enjoyed a legendary career as a coach, something few would’ve predicted during his time as a professional.
Marian Vajda never broke into the top 30 as a player
Vajda turned professional in 1984 and quickly found success on the tour, picking up his first ATP title in 1987.
It was in 1987 that Vajda reached his career-high ranking, peaking at 34th in the world, in September.
His best Grand Slam result came four years later at the 1991 French Open, when Vajda defeated Niclas Kroon and Henri Leconte en route to the third round.
Vajda retired in 1994, having contested four ATP finals, winning two, during his career-best 1987 and 1988 seasons.
| Final | Opponent | Result | Score |
| 1987 Munich | Guillermo Perez Roldan | Loss | 3-6, 6-7 |
| 1987 Prague | Tomas Smid | Win | 6-1, 6-3 |
| 1988 Geneva | Kent Carlsson | Win | 6-4, 6-4 |
| 1989 Bari | Juan Aguilera | Loss | 6-4, 3-6, 4-6 |
The Slovak also enjoyed a successful Davis Cup career, winning all four of his matches in 1994 as Slovakia won the Group Three final.
It was, however, in coaching that Vajda enjoyed the majority of his success, carving out an untouchable legacy, winning 20 Grand Slam titles.
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