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

May 20, 2020, Darlington, SC, USA; A member of the Darlington Racetrack fire and rescue crew takes photos during the Toyota 500. Mandatory Credit: Brynn Anderson/Pool Photo via USA TODAY Network

Apr 25, 2020; Jefferson, SD, USA; A racetrack employee directs a truck into position as drivers and their cars arrive at Park Jefferson Speedway on Saturday, April 25, in Jefferson, S.D. The racing event is going on without fans present because of the coronavirus pandemic. Mandatory Credit: Erin Bormett/Sioux Falls Argus Leader via USA TODAY NETWORK

Apr 25, 2020; Jefferson, SD, USA; Chris Meek and his daughters Hadley, 2, and Taylor, 9, watch cars prepare for racing as they drive past Park Jefferson Speedway on Saturday, April 25, in Jefferson, S.D. The racing event is going on without fans present because of the coronavirus pandemic. The Meek family said they were at the racetrack every Saturday and Sunday last summer and hope they can return this year. Mandatory Credit: Erin Bormett/Sioux Falls Argus Leader via USA TODAY NETWORK

Saudi King Salman bin Abdulaziz attends the final race of Saudi Cup-the world's richest horse race, at King Abdulaziz Racetrack, in Riyadh, Saudi Arabia February 29, 2020. Picture taken February 29, 2020. Bandar Algaloud/Courtesy of Saudi Royal Court/Handout via REUTERS ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Abdullah bin Khalid bin Sultan and Muhammad bin Sultan Al Nasser Al Saud pose with a trophy REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 General view as trophies are awarded after Omsiyaatee wins the The Jockey Club Local Handicap ridden by Adel Alfouradi REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 General view as trophies are awarded after Tallab Al Khalediah wins The Obaiya Arabian Classic ridden by Roberto Perez REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 General view as trophies are awarded after Tallab Al Khalediah wins The Obaiya Arabian Classic ridden by Roberto Perez REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Luis Saez celebrates with the trophy after winning the Saudi Cup on Maximum Security REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Luis Saez celebrates with the trophy after winning the Saudi Cup on Maximum Security REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Luis Saez celebrates with the trophy after winning the Saudi Cup on Maximum Security REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Luis Saez poses for a photo with the trophy after winning the Saudi Cup on Maximum Security REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Luis Saez celebrates with the trophy after winning the Saudi Cup on Maximum Security REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Luis Saez celebrates with the trophy after winning the Saudi Cup on Maximum Security REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Luis Saez celebrates with the trophy after winning the Saudi Cup on Maximum Security REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 General view as trophies are awarded after Omsiyaatee wins the The Jockey Club Local Handicap ridden by Adel Alfouradi REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 General view as the race winners trophy is collected by the owner of Full Flat after winning The Samba Saudi Derby with jockey Yutaka Take and trainer Hideyuki Mori REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Luis Saez wins the Saudi Cup on Maximum Security REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Luis Saez wins the Saudi Cup on Maximum Security REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Luis Saez wins the Saudi Cup on Maximum Security REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Luis Saez wins the Saudi Cup on Maximum Security REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Luis Saez wins the Saudi Cup on Maximum Security REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Luis Saez wins the Saudi Cup on Maximum Security REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 General view during the Saudi Cup REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Saudi King Salman bin Abdulaziz before The Saudi Cup race REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Adel Alfouradi celebrates winning the The Jockey Club Local Handicap on Omsiyaatee REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Irad Ortiz Jr. on New York Central and Yutaka Take on Matera Sky during The Saudia Sprint REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Irad Ortiz Jr. celebrates with the trophy after winning The Saudia Sprint on New York Central REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Roberto Perez celebrates winning The Obaiya Arabian Classic on Tallab Al Khalediah REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Roberto Perez celebrates with a trophy after winning The Obaiya Arabian Classic on Tallab Al Khalediah REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Jockey Frankie Dettori and trainer Allan Smith collect their trophies after Dark Power wins The stc 1351 Cup REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Irad Ortiz Jr. wins The Saudia Sprint on New York Central REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Irad Ortiz Jr. wins The Saudia Sprint on New York Central REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Irad Ortiz Jr. celebrates winning The Saudia Sprint on New York Central REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Jockey Frankie Dettori and trainer Allan Smith collect their trophies after Dark Power wins The stc 1351 Cup REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Trainer Freddie Head and jockey Olivier Peslier celebrate with trophies after Call The Wind wins the Longines Turf Cup REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Trainer Freddie Head and jockey Olivier Peslier celebrate with trophies after Call The Wind wins the Longines Turf Cup REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Yutaka Take wins The Samba Saudi Derby on Full Flat REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Roberto Perez celebrates winning The Obaiya Arabian Classic on Tallab Al Khalediah REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Yutaka Take celebrates winning The Samba Saudi Derby on Full Flat REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Yutaka Take celebrates winning The Samba Saudi Derby on Full Flat REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Yutaka Take celebrates winning The Samba Saudi Derby on Full Flat alongside trainer Hideyuki Mori REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Yutaka Take celebrates winning The Samba Saudi Derby on Full Flat beside trainer Hideyuki Mori REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Yutaka Take celebrates winning The Samba Saudi Derby on Full Flat beside trainer Hideyuki Mori REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Jockey Roberto Perez before racing on Tallab Al Khalediah in The Obaiya Arabian Classic REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Roberto Perez celebrates winning The Obaiya Arabian Classic on Tallab Al Khalediah REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Roberto Perez celebrates winning The Obaiya Arabian Classic on Tallab Al Khalediah REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Adel Alfouradi celebrates winning the The Jockey Club Local Handicap on Omsiyaatee REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Adel Alfouradi celebrates winning the The Jockey Club Local Handicap on Omsiyaatee REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Owner Sheikh Nasser bin Hamad al Khalifa, jockey Adrie de Vries and trainer Fawzi Abdulla Nass are presented with trophies after Port Lions wins the Mohamed Yousuf Naghi Motors Cup REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Winning owner Sheikh Nasser bin Hamad al Khalifa celebrates with the trophy after Port Lions ridden by Adrie de Vries wins the Mohamed Yousuf Naghi Motors Cup REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Olivier Peslier celebrates winning the Longines Turf Cup on Call The Wind alongside trainer Freddie Head REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Olivier Peslier celebrates winning the Longines Turf Cup on Call The Wind REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 General view during the Longines Turf Cup REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 29, 2020 Olivier Peslier celebrates winning the Longines Turf Cup on Call The Wind REUTERS/Ahmed Yosri