Team GB Judoka Ashley McKenzie and Frazer Chamberlain during a training session in their garden in Camberley, following the outbreak of the coronavirus disease (COVID-19), Camberley, Britain, May 12, 2020. REUTERS/Peter Cziborra

Team GB Judoka Ashley McKenzie during a training session in Camberley, following the outbreak of the coronavirus disease (COVID-19), Camberley, Britain, May 12, 2020. REUTERS/Peter Cziborra

Team GB Judoka Ashley McKenzie during a training session in Camberley, following the outbreak of the coronavirus disease (COVID-19), Camberley, Britain, May 12, 2020. REUTERS/Peter Cziborra

Team GB Judoka Ashley McKenzie during a training session in Camberley, following the outbreak of the coronavirus disease (COVID-19), Camberley, Britain, May 12, 2020. REUTERS/Peter Cziborra

Team GB Judoka Ashley McKenzie during a training session in Camberley, following the outbreak of the coronavirus disease (COVID-19), Camberley, Britain, May 12, 2020. REUTERS/Peter Cziborra

Team GB Judoka Ashley McKenzie during a training session in Camberley, following the outbreak of the coronavirus disease (COVID-19), Camberley, Britain, May 12, 2020. REUTERS/Peter Cziborra

Team GB Judoka Ashley McKenzie poses during a training session outside Camberley Judo Club, following the outbreak of the coronavirus disease (COVID-19), Camberley, Britain, May 12, 2020. REUTERS/Peter Cziborra

Team GB Judoka Ashley McKenzie during a training session with dog Luna in Camberley, following the outbreak of the coronavirus disease (COVID-19), Camberley, Britain, May 12, 2020. REUTERS/Peter Cziborra

Team GB Judoka Ashley McKenzie and Frazer Chamberlain pose during a training session outside Camberley Judo Club, following the outbreak of the coronavirus disease (COVID-19), Camberley, Britain, May 12, 2020. REUTERS/Peter Cziborra

Team GB Judoka Ashley McKenzie and Frazer Chamberlain during a training session in their garden in Camberley, following the outbreak of the coronavirus disease (COVID-19), Camberley, Britain, May 12, 2020. REUTERS/Peter Cziborra

Team GB Judoka Ashley McKenzie and Frazer Chamberlain during a training session in their garden in Camberley, following the outbreak of the coronavirus disease (COVID-19), Camberley, Britain, May 12, 2020. REUTERS/Peter Cziborra

Team GB Judoka Ashley McKenzie and Frazer Chamberlain during a training session in their garden in Camberley, following the outbreak of the coronavirus disease (COVID-19), Camberley, Britain, May 12, 2020. REUTERS/Peter Cziborra TPX IMAGES OF THE DAY

Team GB Judoka Ashley McKenzie and Frazer Chamberlain during a training session in their garden in Camberley, following the outbreak of the coronavirus disease (COVID-19), Camberley, Britain, May 12, 2020. REUTERS/Peter Cziborra

Team GB Judoka Ashley McKenzie and Frazer Chamberlain during a training session in their garden in Camberley, following the outbreak of the coronavirus disease (COVID-19), Camberley, Britain, May 12, 2020. REUTERS/Peter Cziborra

Italian judo gold medalist Fabio Basile poses after training at an Olympic centre near Rome after Italy allowed for athletes to train individually as the country begins a gradual end to its strict lockdown restrictions to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy May 5, 2020. REUTERS/Guglielmo Mangiapane

Italian judo gold medalist Fabio Basile trains at an Olympic centre near Rome after Italy allowed for athletes to train individually as the country begins a gradual end to its strict lockdown restrictions to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy May 5, 2020. REUTERS/Guglielmo Mangiapane

Italian judo gold medalist Fabio Basile trains at an Olympic centre near Rome after Italy allowed for athletes to train individually as the country begins a gradual end to its strict lockdown restrictions to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy May 5, 2020. REUTERS/Guglielmo Mangiapane

Italian judo gold medalist Fabio Basile trains at an Olympic centre near Rome after Italy allowed for athletes to train individually as the country begins a gradual end to its strict lockdown restrictions to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy May 5, 2020. REUTERS/Guglielmo Mangiapane

Italian judo gold medalist Fabio Basile trains at an Olympic centre near Rome after Italy allowed for athletes to train individually as the country begins a gradual end to its strict lockdown restrictions to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy May 5, 2020. REUTERS/Guglielmo Mangiapane

Italian judo gold medalist Fabio Basile trains at an Olympic centre near Rome after Italy allowed for athletes to train individually as the country begins a gradual end to its strict lockdown restrictions to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy May 5, 2020. REUTERS/Guglielmo Mangiapane

Italian judo gold medalist Fabio Basile trains at an Olympic centre near Rome after Italy allowed for athletes to train individually as the country begins a gradual end to its strict lockdown restrictions to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy May 5, 2020. REUTERS/Guglielmo Mangiapane

Italian judo gold medalist Fabio Basile trains at an Olympic centre near Rome after Italy allowed for athletes to train individually as the country begins a gradual end to its strict lockdown restrictions to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy May 5, 2020. REUTERS/Guglielmo Mangiapane

Italian judo gold medalist Fabio Basile trains at an Olympic centre near Rome with director of technique of the national section of Judo, Kiyoshi Murakami after Italy allowed for athletes to train individually as the country begins a gradual end to its strict lockdown restrictions to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy May 5, 2020. REUTERS/Guglielmo Mangiapane

Italian judo gold medalist Fabio Basile trains at an Olympic centre near Rome after Italy allowed for athletes to train individually as the country begins a gradual end to its strict lockdown restrictions to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy May 5, 2020. REUTERS/Guglielmo Mangiapane

Italian judo gold medalist Fabio Basile trains at an Olympic centre near Rome after Italy allowed for athletes to train individually as the country begins a gradual end to its strict lockdown restrictions to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy May 5, 2020. REUTERS/Guglielmo Mangiapane

Italian judo gold medalist Fabio Basile trains at an Olympic centre near Rome after Italy allowed for athletes to train individually as the country begins a gradual end to its strict lockdown restrictions to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy May 5, 2020. REUTERS/Guglielmo Mangiapane

Italian judo gold medalist Fabio Basile trains at an Olympic centre near Rome after Italy allowed for athletes to train individually as the country begins a gradual end to its strict lockdown restrictions to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy May 5, 2020. REUTERS/Guglielmo Mangiapane

Italian judo gold medalist Fabio Basile trains at an Olympic centre near Rome after Italy allowed for athletes to train individually as the country begins a gradual end to its strict lockdown restrictions to combat the spread of the coronavirus disease (COVID-19), in Rome, Italy May 5, 2020. REUTERS/Guglielmo Mangiapane

Prefectural staff members prepare for a shelter on the judo rings for those who don't have a stable residence, after places like a 24-hour internet cafes or manga cafes, used as temporary housing have been asking them to leave, after the coronavirus disease (COVID-19) outbreak state-of-emergency was announced at a martial arts stadium in Yokohama, south of Tokyo, Japan April 13, 2020. REUTERS/Issei Kato

Prefectural staff members prepare for a shelter on the judo rings for those who don't have a stable residence, after places like a 24-hour internet cafes or manga cafes, used as temporary housing have been asking them to leave, after the coronavirus disease (COVID-19) outbreak state-of-emergency was announced at a martial arts stadium in Yokohama, south of Tokyo, Japan April 13, 2020. REUTERS/Issei Kato

Prefectural staff members prepare for a bed and shelter on the judo rings for those who don't have a stable residence, after places like a 24-hour internet cafes or manga cafes, used as temporary housing have been asking them to leave, after the coronavirus disease (COVID-19) outbreak state-of-emergency was announced at a martial arts stadium in Yokohama, south of Tokyo, Japan April 13, 2020. REUTERS/Issei Kato

Prefectural staff members prepare for a shelter on the judo rings for those who don't have a stable residence, after places like a 24-hour internet cafes or manga cafes, used as temporary housing have been asking them to leave, after the coronavirus disease (COVID-19) outbreak state-of-emergency was announced at a martial arts stadium in Yokohama, south of Tokyo, Japan April 13, 2020. REUTERS/Issei Kato

Prefectural staff members prepare for a shelter on the judo rings for those who don't have a stable residence, after places like a 24-hour internet cafes or manga cafes, used as temporary housing have been asking them to leave, after the coronavirus disease (COVID-19) outbreak state-of-emergency was announced at a martial arts stadium in Yokohama, south of Tokyo, Japan April 13, 2020. REUTERS/Issei Kato

Prefectural staff members prepare for a shelter on the judo rings for those who don't have a stable residence, after places like a 24-hour internet cafes or manga cafes, used as temporary housing have been asking them to leave, after the coronavirus disease (COVID-19) outbreak state-of-emergency was announced at a martial arts stadium in Yokohama, south of Tokyo, Japan April 13, 2020. REUTERS/Issei Kato

Hadeel Alami, a Jordanian judo practitioner, speaks with her family after training at home during the curfew imposed by the government amid concerns over the spread of the coronavirus disease (COVID-19), in Amman, Jordan, April 9, 2020. REUTERS/Muhammad Hamed

Hadeel Alami, a Jordanian judo practitioner, raises her six-year-old sister as a part of her training at home during the curfew imposed by the government amid concerns over the spread of the coronavirus disease (COVID-19), in Amman, Jordan, April 9, 2020. REUTERS/Muhammad Hamed

Hadeel Alami, a Jordanian judo practitioner, speaks with her family after training at home during the curfew imposed by the government amid concerns over the spread of the coronavirus disease (COVID-19), in Amman, Jordan, April 9, 2020. REUTERS/Muhammad Hamed

Hadeel Alami, a Jordanian judo practitioner, trains with a wooden ladder at home during the curfew imposed by the government amid concerns over the spread of the coronavirus disease (COVID-19), in Amman, Jordan, April 9, 2020. REUTERS/Muhammad Hamed

Hadeel Alami, a Jordanian judo practitioner, trains with a wooden ladder at home during the curfew imposed by the government amid concerns over the spread of the coronavirus disease (COVID-19), in Amman, Jordan, April 9, 2020. REUTERS/Muhammad Hamed

Hadeel Alami, a Jordanian judo practitioner, uses a water bottle to train at home during the curfew imposed by the government amid concerns over the spread of the coronavirus disease (COVID-19), in Amman, Jordan, April 9, 2020. REUTERS/Muhammad Hamed

Hadeel Alami, a Jordanian judo practitioner, trains on the roof of her home during the curfew imposed by the government amid concerns over the spread of the coronavirus disease (COVID-19), in Amman, Jordan, April 9, 2020. REUTERS/Muhammad Hamed

Hadeel Alami, a Jordanian judo practitioner, uses the sofa as a part of her trainings at her home during the curfew imposed by the government amid concerns over the spread of the coronavirus disease (COVID-19), in Amman, Jordan, April 9, 2020. REUTERS/Muhammad Hamed TPX IMAGES OF THE DAY

Tokyo 2020 - Judo

Britain's Catherine, Duchess of Cambridge, watches a Judo display as she attends a SportsAid event at the London Stadium at the Olympic Park in Stratford in London, Britain, February 26, 2020. Yui Mok/Pool via REUTERS

Graphics explaining the technique and scoring of judo

Tokyo 2020 - Judo

Graphics explaining the technique and scoring of judo ??

Judo - Paris International Grand Slam judo tournament - Women under 57kg - AccorHotels Arena, Paris, France - February 8, 2020. Timna Nelson Levy from Israel in action. REUTERS/Christian Hartmann

Judo - Paris International Grand Slam judo tournament - Women under 57kg - AccorHotels Arena, Paris, France - February 8, 2020. Nora Gjakova from Kosovo in action. REUTERS/Christian Hartmann

Judo - Paris International Grand Slam judo tournament - Women under 57kg - AccorHotels Arena, Paris, France - February 8, 2020. Sanne Verhagen from the Netherlands in action. REUTERS/Christian Hartmann

Judo - Paris International Grand Slam judo tournament - Men under 60kg - AccorHotels Arena, Paris, France - February 8, 2020. Walide Khyar from France in action. REUTERS/Christian Hartmann

Judo - Paris International Grand Slam judo tournament - Men under 60kg - AccorHotels Arena, Paris, France - February 8, 2020. Ryuju Nagayama from Japan in action. REUTERS/Christian Hartmann

Judo - Paris International Grand Slam judo tournament - Women under 57kg - AccorHotels Arena, Paris, France - February 8, 2020. Jessica Klimkait from Canada in action. REUTERS/Christian Hartmann

Judo - Paris International Grand Slam judo tournament - Women under 57kg - AccorHotels Arena, Paris, France - February 8, 2020. Jandi Kim from South Korea in action. REUTERS/Christian Hartmann

Judo - Paris International Grand Slam judo tournament - Women under 57kg - AccorHotels Arena, Paris, France - February 8, 2020. Sumiya Dorjsuren of Mongolia in action. REUTERS/Christian Hartmann

Judo - Paris International Grand Slam judo tournament - Women under 57kg - AccorHotels Arena, Paris, France - February 8, 2020. Christa Deguchi of Canada in action. REUTERS/Christian Hartmann

Judo - Paris International Grand Slam judo tournament - Women under 57kg - AccorHotels Arena, Paris, France - February 8, 2020. Timna Nelson Levy of Israel in action. REUTERS/Christian Hartmann

Judo - Paris International Grand Slam judo tournament - Men under 73kg - AccorHotels Arena, Paris, France - February 8, 2020. Masashi Ebinuma of Japan in action. REUTERS/Christian Hartmann

Judo - Paris International Grand Slam judo tournament - Men under 66kg - AccorHotels Arena, Paris, France - February 8, 2020. Bogdan Iadov of Ukraine in action. REUTERS/Christian Hartmann

Judo - Paris International Grand Slam judo tournament - Women under 48kg - AccorHotels Arena, Paris, France - February 8, 2020. Laura Martinez Abelenda of Spain in action. REUTERS/Christian Hartmann