Nadal baffled by Olympics no-shows

Rafael Nadal knows only too well what it's like to miss out on playing at the Olympics, so he doesn't understand why so many of his fellow tennis pros are turning their backs on the Rio Games.

When injury forced the 2008 Beijing gold medalist to withdraw from the 2012 London Games, he described it as "one of the saddest moments of my career".

No wonder he finds it baffling the likes of American John Isner, Australian Bernard Tomic, rising Austrian Dominic Thiem and fellow Spaniard Feliciano Lopez have chosen to skip Rio in August.

"The experience of competing in an Olympic Games is completely different than any other event. The Olympics is the most important event in the world of sport," the nine-time French Open champion said on Thursday.

"If you don't want to be in the most important event in the world of sport, then is difficult to understand what's the motivation for the rest of the things."

Isner blamed his decision on a crammed tennis calendar, with the US Open taking place shortly after the Rio Games and the Davis Cup quarterfinals just after Wimbledon.

But the lack of ranking points at this year's Olympics was also a major factor for the American.

World 1 Novak Djokovic had some sympathy for players such as Isner and thought ranking points should have been awarded in Rio like they had been in London, where up to 750 points were on offer.

But points or no points, Nadal thought those who choose to skip the Games will end up regretting their decisions.

"Everybody's free to do whatever, but I know how tough it was for me when I had to miss the 2012 Olympics in London," said Nadal, the only active men's player who has won every major singles title the sport has to offer.

"I cannot understand people who don't want to go to the Olympics. It's something that is not every year. It's an event that you can compete only once, twice, or maybe three times in your career, if you are lucky, so you don't want to miss that."

That sentiment is shared by Venus Williams.

"Everybody's got priorities. Mine are at the Olympics. Others ... I don't know. It's just life choices," said the 35-year-old American, who owns four Olympic golds across singles and doubles.

"It's a wonderful experience to be part of something so amazing.

"For me, the Olympics was beyond my dreams to participate and to actually have success there was something I had never dreamed of, and I didn't realize how wonderful it will be.

"So I always say it was beyond anything I ever dreamed."

The Games open on Aug 5.