Alex Ishkov, dressed as George Washington, plays pingpong at a vendor's booth at Politicon, "the unconventional political convention", at the Pasadena Convention Center in Pasadena, California, U.S., July 29, 2017. REUTERS/Andrew Cullen

Alex Ishkov, dressed as George Washington, plays pingpong at a vendor's booth at Politicon, "the unconventional political convention", at the Pasadena Convention Center in Pasadena, California, U.S., July 29, 2017. REUTERS/Andrew Cullen

Austrian table tennis players Chen Weixing, Li Qiangbing, Robert Gardos and Werner Schlager (LtoR) serve the ball during a training session in Schwechat outside Vienna May 2, 2012. Chen, Li, Gardos and Schleger will participate at the 2012 Olympic Games. Picture taken May 2, 2012. REUTERS/Leonhard Foeger (AUSTRIA - Tags: SPORT OLYMPICS TABLE TENNIS)

Pingpong-playing robot "Topio" is displayed during the InternationalRobot Exhibition 2009 in Tokyo November 25, 2009. The bipedal humanoidrobot is designed to play table tennis against a human being.REUTERS/Kim Kyung-Hoon (JAPAN SCI TECH SOCIETY HEALTH) BEST QUALITY AVAILABLE

Pingpong-playing robot "Topio" is displayed during the InternationalRobot Exhibition 2009 in Tokyo November 25, 2009. The bipedal humanoidrobot is designed to play table tennis against a human being.REUTERS/Kim Kyung-Hoon (JAPAN SCI TECH SOCIETY HEALTH) FOR BEST QUALITY: ALSO SEE GM1E5CI16M901.

A man returns a ping pong ball as he tries out "Digital Pingpong" during a news preview of "Yokohama Eizone 2008", an event showcasing visual, digital and interactive artworks in Yokohama, south of Tokyo July 23, 2008. The interactive artwork, created by Japanese digital creator Yuji Hirayama, creates sound and the digital image projected on the table changes every time the ball hits the surface. REUTERS/Yuriko Nakao (JAPAN)

A man eyes a ping pong ball as he tries out "Digital Pingpong" during a news preview of "Yokohama Eizone 2008", an event showcasing visual, digital and interactive artworks in Yokohama, south of Tokyo July 23, 2008. The interactive artwork, created by Japanese digital creator Yuji Hirayama, creates sound and the digital image projected on the table changes every time the ball hits the surface. REUTERS/Yuriko Nakao (JAPAN)

An earthquake evacuee sits on a pingpong table as he takes temporary shelter inside a sports stadium turned evacuation center in Mianyang City, Sichuan province May 14, 2008. China poured more troops into the earthquake-ravaged province of Sichuan on Wednesday to quicken a search for survivors as time ran out for thousands of people still buried under rubble and mud. REUTERS/Claro Cortes IV (CHINA)

'Mutley,' a Fox Terrier and President of the jury for the Palm Dog Awards 2006, poses at the annual awards ceremony during the 59th Cannes Film Festival May 26, 2006. [The winner of this year's Palm Dog, a sideline event at the festival, was awarded to a 'Mopf,' the canine star of U.S. director Sofia Coppola's in-competition film 'Marie Antoinette'. Runner-up was 'Schumann,' who appeared in German director Matthias Luthardt's film 'Pingpong.']

'Mutley,' a Fox Terrier and President of the jury for the Palm Dog Awards 2006, poses at the annual awards ceremony during the 59th Cannes Film Festival May 26, 2006. [The winner of this year's Palm Dog, a sideline event at the festival, was awarded to a 'Mopf,' the canine star of U.S. director Sofia Coppola's in-competition film 'Marie Antoinette'. Runner-up was 'Schumann,' who appeared in German director Matthias Luthardt's film 'Pingpong.']

'Mutley,' a Fox Terrier and President of the jury for the Palm Dog Awards 2006, poses at the annual awards ceremony during the 59th Cannes Film Festival May 26, 2006. The winner of this year's Palm Dog, a sideline event at the festival, was awarded to a 'Mopf,' the canine star of U.S. director Sofia Coppola's in-competition film 'Marie Antoinette'. Runner-up was 'Schumann,' who appeared in German director Matthias Luthardt's film 'Pingpong.' REUTERS/Eric Gaillard

'Mutley,' a Fox Terrier and President of the jury for the Palm Dog Awards 2006, poses at the annual awards ceremony during the 59th Cannes Film Festival May 26, 2006. The winner of this year's Palm Dog, a sideline event at the festival, was awarded to a 'Mopf,' the canine star of U.S. director Sofia Coppola's in-competition film 'Marie Antoinette'. Runner-up was 'Schumann,' who appeared in German director Matthias Luthardt's film 'Pingpong.' REUTERS/Eric Gaillard

Ro'i Arard (R) called Chicky of Israeli band PingPong holds a Syrian flag during the first dress rehearsal of the Grand Prix Eurovision Song Contest 2000 in Stockholm May 12. The head of the official Israeli delegation said PingPong were forbidden from waving Syrian and Israeli flags at the contest on Saturday, as they did at Wednesday's rehearsal. Their controversial song is about an Israeli girl dreaming of her lover in Syria.

Members of the Israeli band PingPong jump with Syrian and Israeli flags during the first dress rehearsal of the Grand Prix Eurovision Song Contest 2000 in Stockholm May 12. The winner of the Grand Prix will be chosen via a television spectators poll system on Saturday May 13.

PEM

Ro'i Arard (R) called Chicky of Israeli band PingPong holds a Syrian flag during the first dress rehearsal of the Grand Prix Eurovision Song Contest 2000 in Stockholm May 12. The head of the official Israeli delegation said PingPong were forbidden from waving Syrian and Israeli flags at the contest on Saturday, as they did at Wednesday's rehearsal. Their controversial song is about an Israeli girl dreaming of her lover in Syria.

PEM/AA

Prince Charles plays some pingpong with kids at the DoverCourt Boy's and Girl's Club during a visit to the games room April 26 in Toronto. The Prince is on a six day visit to Canada