WATCH: Novak Djokovic edged closer to the Calendar Year Golden Slam after winning his 20th major title at Wimbledon.

Novak Djokovic is set for a "demanding" few weeks as he picks up his quest for a Golden Grand Slam at Tokyo and then the US Open.

Though he isn't "thrilled about playing with no fans present or about the various coronavirus restrictions effective in Japan," Djokovic is playing the Games and will be the favorite for gold.

"It came down to patriotism and my feelings for Serbia," he told Montenegro station MINA, as quoted by Reuters. "But I am full of confidence and motivated to represent Serbia in the best possible way."

The 34-year-old has already won the Australian Open, Roland Garros, and Wimbledon, and is now going for a sweep only done before by Steffi Graf in 1988. He will be returning to competition just two weeks since his win at the All England Club.

"The Olympics, and the US Open, are obviously my biggest objectives for the remainder of the season, and it's going to be demanding," he said.

"I am inspired to play my best tennis and confident that I can win the gold medal.

"And then I'll go to New York, aiming to complete it all."

The Serb is No. 1 in the rankings.