He then lost a one-sided French Open final to Nadal, but Ivanisevic said he could target Margaret Court’s all-time record of 24 Slams.
“I said couple of years ago Rafa and Novak are going to overtake Roger, both of them. I still believe that,” Ivanisevic told reporters.
“They surprise me every day. Rafa for sure is going to win one, I hope not two, but I give him one... They’re producing better and better tennis... When you think the young guns are coming, these guys are one step better in the finals.
“I don’t know where is the end. Maybe they’re going to overtake Margaret Court and Serena Williams (23 majors), maybe not. But it’s amazing what they’re doing on court, how they perform in big matches.”
Federer, 39, has not won a major since winning in Melbourne in 2018 and the Swiss has not played in over a year after requiring surgery on his right knee twice in 2020.
“I’m waiting for Roger to come back,” Ivanisevic added.
“It’s going to be more interesting to see what’s going to happen at the French Open and Wimbledon.”
Ivanisevic said Djokovic’s triumph in Melbourne was also his redemption after the media coverage of his quarantine requests prior to the tournament as well as his injury.
“He needed this victory so badly. There’s somebody upstairs who sees all this unfairness with a lot of media and (what) people (are) doing to him,” Ivanisevic said.
“He’s going through lot, especially after last year -- U.S. Open, then pretty poor final at Roland Garros, it’s not easy.”