Can Novak Djokovic possibly outdo his remarkable 2015 campaign?

As dominant as the world No. 1 has been—and there’s no sign that he’s going to slow down any time soon—it’s a lot to ask from the Serb.

But Mats Wilander is predicting that Djokovic, who won three Grand Slams in 2015, will sweep all four this season.

"A lot of people predicted Novak would win all four this year—and I was one of them," the seven-time Grand Slam champion recently told ESPN’s Greg Garber. "I'm doing it again. Yeah, if he wins the Australian, he wins all four. He just missed this year, and I think that will motivate him to go all the way."

Djokovic won the Australian Open, Wimbledon and the U.S. Open in 2015, defeating Roger Federer in the finals in London and New York.

The 28-year-old reached the final of the French Open, but was stunned by Stan Wawrinka in four sets.

"The thing you have to appreciate about Djokovic is that he's doing it in one of the best eras in men's tennis," Wilander told Garber. "It's harder today. When Roger [Federer won three majors in 2004, 2006 and 2007], Djokovic and Murray were not yet in their prime.

"In 2015, there was no chance Djokovic would have an off day. I just don't see a player that can threaten him. Every tournament he'd go through the best players, get to the final, and usually win."

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Djokovic, who has won in Melbourne five times, will be the favorite Down Under.

Rod Laver is the last men’s player to complete the calendar-year Grand Slam. He achieved the feat in 1969, after doing so seven years earlier as an amateur.