'Everything Is Possible': Djokovic Eyes Golden Grand Slam
"Everything is possible. Definitely in my case I can say that what I've been through in my career, in my life, this journey has been terrific so far," said Djokovic.
"I've achieved some things that a lot of people thought it would be not possible for me to achieve.
"So everything is possible, and I did put myself in a good position to go for the Golden Slam." The Golden Slam has never been achieved by a man while, in the women's game, only Steffi Graf in 1988 has swept all four majors and Olympic gold in the same year.
"But it's still far away from us. We have to still focus on the next one. But overall he's set up for this year.
"As much as Novak is healthy, and he's healthy right now, he's in great shape, I think he has the ability to win the Grand Slam for this year. I'm pretty sure," added Vajda.
"I think it is much more than possible. He loves to play in Wimbledon and US Open." However, Djokovic has been at this juncture before, winning in Australia and Paris in 2016 but coming up short at the Rio Olympics, Wimbledon and the US Open later in the year.
Djokovic now has nine Australian Opens, five Wimbledons, three US Opens and two French Opens.
He has also collected 36 Masters, a Davis Cup and has spent more time at world number one than any other player.
But for two sets on Sunday, he was thoroughly outplayed by 22-year-old Tsitsipas before the Greek's challenge fell apart.
"My guardian angels are there. I have my special corner. It's a secret. I can't reveal the secret. It's been working for me pretty well," he said.