Workers build a seating area for socially distanced Rome Opera House's summer performances at Circus Maximus, the ancient chariot racetrack, following the coronavirus disease (COVID-19) outbreak in Rome, Italy, June 25, 2020. Picture taken June 25, 2020. REUTERS/Guglielmo Mangiapane

Workers build a seating area for socially distanced Rome Opera House's summer performances at Circus Maximus, the ancient chariot racetrack, following the coronavirus disease (COVID-19) outbreak in Rome, Italy, June 25, 2020. Picture taken June 25, 2020. REUTERS/Guglielmo Mangiapane

General view of the seating area and the stage at Circus Maximus for socially distanced Rome Opera House's summer performances at Circus Maximus, the ancient chariot racetrack, following the coronavirus disease (COVID-19) outbreak in Rome, Italy, June 25, 2020. Picture taken June 25, 2020. REUTERS/Guglielmo Mangiapane

Workers build a seating area for socially distanced Rome Opera House's summer performances at Circus Maximus, the ancient chariot racetrack, following the coronavirus disease (COVID-19) outbreak in Rome, Italy, June 25, 2020. Picture taken June 25, 2020. REUTERS/Guglielmo Mangiapane

Workers build a seating area for socially distanced Rome Opera House's summer performances at Circus Maximus, the ancient chariot racetrack, following the coronavirus disease (COVID-19) outbreak in Rome, Italy, June 25, 2020. Picture taken June 25, 2020. REUTERS/Guglielmo Mangiapane

An artist performs near the Old Town Square during a street theater festival in Prague, Czech Republic, July 12, 2020. REUTERS/David W Cerny TPX IMAGES OF THE DAY

An artist performs near the Old Town Square during a street theater festival in Prague, Czech Republic, July 12, 2020. REUTERS/David W Cerny

Artists perform at the Old Town Square during a street theater festival in Prague, Czech Republic, July 12, 2020. REUTERS/David W Cerny

Artists perform near the Old Town Square during a street theater festival in Prague, Czech Republic, July 12, 2020. REUTERS/David W Cerny

Artists perform near the Old Town Square during a street theater festival in Prague, Czech Republic, July 12, 2020. REUTERS/David W Cerny

Artists perform near the Old Town Square during a street theater festival in Prague, Czech Republic, July 12, 2020. REUTERS/David W Cerny

Artists perform at the Old Town Square during a street theater festival in Prague, Czech Republic, July 12, 2020. REUTERS/David W Cerny

Artists perform at the Old Town Square during a street theater festival in Prague, Czech Republic, July 12, 2020. REUTERS/David W Cerny

Artists perform at the Old Town Square during a street theater festival in Prague, Czech Republic, July 12, 2020. REUTERS/David W Cerny

Artists perform at the Old Town Square during a street theater festival in Prague, Czech Republic, July 12, 2020. REUTERS/David W Cerny

Artists perform 'Shakespeare in 15 minutes' during the flower festival 'A Midsummer Night's Dream' in Pakruojis Manor, Pakruojis, Lithuania July 12, 2020. Thousands of colourful summer flowers are arranged in carpets and large sculptures, inspired by William Shakespeare's homonymous play. REUTERS/Ints Kalnins

Artists perform 'Shakespeare in 15 minutes' during the flower festival 'A Midsummer Night's Dream' in Pakruojis Manor, Pakruojis, Lithuania July 12, 2020. Thousands of colourful summer flowers are arranged in carpets and large sculptures, inspired by William Shakespeare's homonymous play. REUTERS/Ints Kalnins

A student holds a cork in his mouth as he performs for voice training session during a Mahendra Perera Actor training class, amid concerns about the spread of the coronavirus disease (COVID-19), in Colombo, Sri Lanka, July 11, 2020. REUTERS/Dinuka Liyanawatte

An artist performs during festival of water lanterns at the amusement park 'Dreamland' in Minsk, July 10, 2020. REUTERS/Vasily Fedosenko

Artists perform during festival of water lanterns at the amusement park 'Dreamland' in Minsk, July 10, 2020. REUTERS/Vasily Fedosenko

Members of the Alfama Quartet rehearse for the classical music concert "Candlelight", in which they play pieces of composers Pyotr Ilyich Tchaikovsky, Felix Mendelssohn and Antonin Dvorak, at the spectacle hall La Tricoterie in Brussels, Belgium, July 9, 2020. REUTERS/Yves Herman

Members of the Alfama Quartet rehearse for the classical music concert "Candlelight", in which they play pieces of composers Pyotr Ilyich Tchaikovsky, Felix Mendelssohn and Antonin Dvorak, at the spectacle hall La Tricoterie in Brussels, Belgium, July 9, 2020. REUTERS/Yves Herman

A Greek Presidential Guard performs his sentry duty as demonstrators attend a protest against government plans to regulate street protests, in front of the parliament building in Athens, Greece, July 9, 2020. REUTERS/Alkis Konstantinidis

A member of the Alfama Quartet plays during classical music concert "Candlelight", in which they play pieces of composers Pyotr Ilyich Tchaikovsky, Felix Mendelssohn and Antonin Dvorak, at the spectacle hall La Tricoterie in Brussels, Belgium, July 9, 2020. REUTERS/Yves Herman

Members of the Alfama Quartet play pieces of composers Pyotr Ilyich Tchaikovsky, Felix Mendelssohn and Antonin Dvorak, during the classical music concert "Candlelight", at the spectacle hall La Tricoterie in Brussels, Belgium, July 9, 2020. REUTERS/Yves Herman

Members of the Alfama Quartet play pieces of composers Pyotr Ilyich Tchaikovsky, Felix Mendelssohn and Antonin Dvorak, during the classical music concert "Candlelight", at the spectacle hall La Tricoterie in Brussels, Belgium, July 9, 2020. REUTERS/Yves Herman

Members of the Alfama Quartet play pieces of composers Pyotr Ilyich Tchaikovsky, Felix Mendelssohn and Antonin Dvorak, during the classical music concert "Candlelight", at the spectacle hall La Tricoterie in Brussels, Belgium, July 9, 2020. REUTERS/Yves Herman

A member of the Alfama Quartet plays the violin during classical music concert "Candlelight", in which they play pieces of composers Pyotr Ilyich Tchaikovsky, Felix Mendelssohn and Antonin Dvorak, at the spectacle hall La Tricoterie in Brussels, Belgium, July 9, 2020. REUTERS/Yves Herman

Members of the Alfama Quartet play pieces of composers Pyotr Ilyich Tchaikovsky, Felix Mendelssohn and Antonin Dvorak, during the classical music concert "Candlelight", at the spectacle hall La Tricoterie in Brussels, Belgium, July 9, 2020. REUTERS/Yves Herman

Members of the Alfama Quartet play pieces of composers Pyotr Ilyich Tchaikovsky, Felix Mendelssohn and Antonin Dvorak, during the classical music concert "Candlelight", at the spectacle hall La Tricoterie in Brussels, Belgium, July 9, 2020. REUTERS/Yves Herman

A general view shows La Tricoterie spectacle hall before the start of the classical music concert "Candlelight", by the Alfama Quartet, playing pieces of composers Pyotr Ilyich Tchaikovsky, Felix Mendelssohn and Antonin Dvorak, in Brussels, Belgium, July 9, 2020. REUTERS/Yves Herman

A music sheet is pictured before the start of the classical music concert "Candlelight", by the Alfama Quartet, playing pieces of composers Pyotr Ilyich Tchaikovsky, Felix Mendelssohn and Antonin Dvorak, at the spectacle hall La Tricoterie in Brussels, Belgium, July 9, 2020. REUTERS/Yves Herman

Britain's Prince Charles steps out of a car and performs a socially distanced greeting as he visits the Turnbull & Asser shirt factory, a company that switched their entire production line to making scrubs for the NHS during the coronavirus disease (COVID-19) outbreak, in Gloucester, Britain July 9, 2020. Matthew Horwood/Pool via REUTERS

Mourners perform prayers in front of the body of a man, suspected to have died from the coronavirus disease (COVID-19) in Taiz, Yemen June 25, 2020. Picture taken June 25, 2020. REUTERS/Anees Mahyoub

Soccer Football - Premier League - Brighton & Hove Albion v Liverpool - The American Express Community Stadium, Brighton, Britain - July 8, 2020 A member of staff wearing a face mask performs maintenance work on the pitch before the match, as play resumes behind closed doors following the outbreak of the coronavirus disease (COVID-19) Daniel Leal Olivas/Pool via REUTERS EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 75 images, no video emulation. No use in betting, games or single club/league/player publications. Please contact your account representative for further details.

A medical staff member performs a PCR test for COVID-19 on a resident in response to a localized outbreak of the coronavirus disease (COVID-19), in Ordizia, Spain, July 8, 2020. REUTERS/Vincent West

Medical staff perform PCR tests for COVID-19 on residents in response to a localized outbreak of the coronavirus disease (COVID-19), in Ordizia, Spain, July 8, 2020. REUTERS/Vincent West

Medical staff perform PCR tests for COVID-19 on residents in response to a localized outbreak of the coronavirus disease (COVID-19), in Ordizia, Spain, July 8, 2020. REUTERS/Vincent West

People queue to take PCR tests for COVID-19, which are performed on residents in response to a localized outbreak of the coronavirus disease (COVID-19), in Ordizia, Spain, July 8, 2020. REUTERS/Vincent West

A woman wearing a protective mask poses with a street performer, amid the coronavirus disease (COVID-19) outbreak, in Madrid, Spain, July 8, 2020. REUTERS/Susana Vera

A string quartet of musicians from the New York Philharmonic Orchestra perform Schubert's String Quartet in A minor "Rosamund", in a sidewalk park across from David Geffen Hall at Lincoln Center, in their first public performance since the Orchestra's closing in March due to the outbreak of the coronavirus disease (COVID-19) in Manhattan in New York City, New York, U.S., July 7, 2020. REUTERS/Mike Segar

A string quartet of musicians from the New York Philharmonic Orchestra perform Schubert's String Quartet in A minor "Rosamund", in a sidewalk park across from David Geffen Hall at Lincoln Center, in their first public performance since the Orchestra's closing in March due to the outbreak of the coronavirus disease (COVID-19) in Manhattan in New York City, New York, U.S., July 7, 2020. REUTERS/Mike Segar

A string quartet of musicians from the New York Philharmonic Orchestra perform Schubert's String Quartet in A minor "Rosamund", in a sidewalk park across from David Geffen Hall at Lincoln Center, in their first public performance since the Orchestra's closing in March due to the outbreak of the coronavirus disease (COVID-19) in Manhattan in New York City, New York, U.S., July 7, 2020. REUTERS/Mike Segar

A string quartet of musicians from the New York Philharmonic Orchestra perform Schubert's String Quartet in A minor "Rosamund", in a sidewalk park across from David Geffen Hall at Lincoln Center, in their first public performance since the Orchestra's closing in March due to the outbreak of the coronavirus disease (COVID-19) in Manhattan in New York City, New York, U.S., July 7, 2020. REUTERS/Mike Segar

A string quartet of musicians from the New York Philharmonic Orchestra perform Schubert's String Quartet in A minor "Rosamund", in a sidewalk park across from David Geffen Hall at Lincoln Center, in their first public performance since the Orchestra's closing in March due to the outbreak of the coronavirus disease (COVID-19) in Manhattan in New York City, New York, U.S., July 7, 2020. REUTERS/Mike Segar

Spanish apprentice bullfighter Nabil Essaouari "El Moro", performs a pass to bull horns as he practices in a bullring, on the day the first running of the bulls of the San Fermin festival, which was cancelled due to the coronavirus disease (COVID-19) outbreak, should have taken place, in Pamplona, Spain July 7, 2020. REUTERS/Jon Nazca

Spanish apprentice bullfighter Nabil Essaouari "El Moro", performs a pass to bull horns as he practices in a bullring, on the day the first running of the bulls of the San Fermin festival, which was cancelled due to the coronavirus disease (COVID-19) outbreak, should have taken place, in Pamplona, Spain July 7, 2020. REUTERS/Jon Nazca

Spanish apprentice bullfighter Nabil Essaouari "El Moro", performs a pass to bull horns as he practices in a bullring, on the day the first running of the bulls of the San Fermin festival, which was cancelled due to the coronavirus disease (COVID-19) outbreak, should have taken place, in Pamplona, Spain July 7, 2020. REUTERS/Jon Nazca

Lebanese maestro Harout Fazlian stands on stage before the start of "Sound of Resilience" concert of the Baalbeck music festival, which was broadcasted live with no audience, in Baalbeck, Lebanon July 5, 2020. Picture taken July 5, 2020. REUTERS/Aziz Taher

Musicians from Lebanon's philharmonic orchestra are seen on stage before the start of "Sound of Resilience" concert of the Baalbeck music festival, which was broadcasted live with no audience, in Baalbeck, Lebanon July 5, 2020. Picture taken July 5, 2020. REUTERS/Aziz Taher

Lebanese maestro Harout Fazlian stands on stage before the start of "Sound of Resilience" concert of the Baalbeck music festival, which was broadcasted live with no audience, in Baalbeck, Lebanon July 5, 2020. Picture taken July 5, 2020. REUTERS/Aziz Taher

Musicians from Lebanon's philharmonic orchestra are seen on stage before the start of "Sound of Resilience" concert of the Baalbeck music festival, which was broadcasted live with no audience, in Baalbeck, Lebanon July 5, 2020. Picture taken July 5, 2020. REUTERS/Aziz Taher

Houthi followers perform the traditional Baraa dance during a gathering in Sanaa, Yemen July 6, 2020. REUTERS/Khaled Abdullah TPX IMAGES OF THE DAY

Houthi followers perform the traditional Baraa dance during a gathering in Sanaa, Yemen July 6, 2020. REUTERS/Khaled Abdullah

Houthi followers perform the traditional Baraa dance during a gathering in Sanaa, Yemen July 6, 2020. REUTERS/Khaled Abdullah

A violonist performs during an action by Paris tour guides at Le Louvre museum courtyard to warn on their working conditions in Paris as the museum reopens its doors to the public after almost 4-month closure due to the coronavirus disease (COVID-19) outbreak in France, July 6, 2020. REUTERS/Christian Hartmann

Artists, some of them wearing protective masks, perform during "La Villi. Fatum" opera show in front of the art council in the National Academic Bolshoi Opera and Ballet Theatre of the Republic of Belarus (Bolshoi Theatre of Belarus) in Minsk, Belarus July 5, 2020. The theatre has been closed to spectators since April 2020 because of the coronavirus disease (COVID-19) outbreak. REUTERS/Vasily Fedosenko

Artists perform during "La Villi. Fatum" opera show in front of the art council in the National Academic Bolshoi Opera and Ballet Theatre of the Republic of Belarus (Bolshoi Theatre of Belarus) in Minsk, Belarus July 5, 2020. The theatre has been closed to spectators since April 2020 because of the coronavirus disease (COVID-19) outbreak. REUTERS/Vasily Fedosenko

Artists, some of them wearing protective masks, perform during "La Villi. Fatum" opera show in front of the art council in the National Academic Bolshoi Opera and Ballet Theatre of the Republic of Belarus (Bolshoi Theatre of Belarus) in Minsk, Belarus July 5, 2020. The theatre has been closed to spectators since April 2020 because of the coronavirus disease (COVID-19) outbreak. REUTERS/Vasily Fedosenko

Artists, some of them wearing protective masks, perform during "La Villi. Fatum" opera show in front of the art council in the National Academic Bolshoi Opera and Ballet Theatre of the Republic of Belarus (Bolshoi Theatre of Belarus) in Minsk, Belarus July 5, 2020. The theatre has been closed to spectators since April 2020 because of the coronavirus disease (COVID-19) outbreak. REUTERS/Vasily Fedosenko