19-time Grand Slam Champion Rafael Nadal was seen cleaning his own court in a video which went viral on the internet.
Allistair McCaw, a renown author, took to Twitter to share the video and urged young athletes to follow into Nadal's steps.
"A great example to all young athletes out there, regardless of what sport you play. If multiple Grand Slam Champion Rafael Nadal can clean his own court after him, then you can clean your training area up afterwards too. It’s called humility & respect," he tweeted.
Last month, Nadal had insisted that tennis "cannot resume until the situation is completely safe", adding that he would not take part in the US Open if the Grand Slam tournament was being played that week.
The world number two, who won his fourth US Open and 19th Grand Slam at last year's event, said he remained convinced the COVID-19 pandemic still casts huge doubts over the tennis calendar which has been suspended since mid-March.
"We cannot resume until the situation is completely safe and fair in terms of health in that all players, wherever they come from, can travel and play tournaments in safe conditions," Nadal told reporters in a video conference call.
"If you told me to play the US Open (scheduled to start on August 24) today, I would say no."
"We have to wait for people to return to normal life. And when it does, wait to see how the virus evolves and how the situation is going to be in New York in a couple of months. Because, of course, New York has been one of the places that have been very strongly hit by the virus. So let's see."
Meanwhile, the ATP and WTA schedules have been suspended since March, with action not set to resume until the end of July at the earliest.
Wimbledon was cancelled for the first time since the Second World War, while the French Open has been shifted to September.