Marian Vajda has hailed Novak Djokovic's victory in the French Open final on Sunday as the best of the Serbian's career.
After losing in two finals at Roland Garros, and having first reached the last four in Paris nine years ago, Djokovic finally lifted the trophy with a 3-6 6-1 6-2 6-4 victory over Andy Murray.
And Vajda, who has been coaching Djokovic since 2006, admitted: "It means a lot because, after 10 years, it's one of the sweetest and best tournaments for me because this was never reached before.
"Now Novak is 29 and, when you get older, your nerves are not that great. It was maybe the last tournament he can win. Maybe he wins one more or two more now but this year was just for him.
"He'd already won 11 grand slams before but never the French. This is the best one for sure."
Djokovic's triumph made him the first man since Rod Laver in 1969 to hold all four slam trophies at the same time.
However, with 12 major titles on his CV, Djokovic still trails Rafa Nadal by two and Roger Federer by five.
Vajda, who has shared coaching duties with Boris Becker since 2013, added: "He's one of the best now. It's tough to say greatest but according to the grand slams he's getting close to Federer and close to Nadal.
"We'll see what the future brings but he's there, he's the best player now, and winning the French I think will give him a boost.
"I don't know if he thinks he can reach 17 but he's reached 12 and this is the time to enjoy it."
Djokovic, himself, talked about the rivalries that have been part of the men's game in recent years.
He said: "These two guys [Nadal and Federer], and Andy, as well, the rivalries with all three of the guys have definitely, in a big part, helped me to become a better player and helped me achieve all these things.
"Of course the rivalries that we have are important for the sport and, in one way or another, you try to compare yourself to them and what they have achieved before.
"Nadal and Federer were so dominant in the sport when Andy and myself came into the mix. At the beginning I was not glad to be part of their era.
"Later on I realised that in life everything happens for a reason. You're put in this position with a purpose, a purpose to learn and to grow and to evolve.
"Fortunately, for me, I realised that I needed to get stronger and that I needed to accept the fact that I'm competing with these two tremendous champions and then everything was uphill from that moment on."
As for completing a season slam, he went on: "Winning this trophy gave me so much happiness and fulfilment. I'm trying to grasp and I'm trying to cherish, obviously, these moments right now.
"Whether or not I can reach a calendar slam, that's still a possibility. But I don't think about it right now."
With victories in Australia and France already under his belt in 2016, he now heads to Wimbledon and then New York for the US Open in an attempt to complete the clean sweep.