Referees

Referees
NEW YORK, NY - SEPTEMBER 09: Juan Martin del Potro of Argentina discusses a situation with chair umpire Alison Hughes during his men's Singles finals match against Novak Djokovic of Serbia on Day Fourteen of the 2018 US Open at the USTA Billie Jean King National Tennis Center on September 9, 2018 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Al Bello/Getty Images) (Source: Al Bello)
NEW YORK, NY - SEPTEMBER 09: Juan Martin del Potro of Argentina discusses a situation with chair umpire Alison Hughes during his men's Singles finals match against Novak Djokovic of Serbia on Day Fourteen of the 2018 US Open at the USTA Billie Jean King National Tennis Center on September 9, 2018 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Al Bello/Getty Images)
NEW YORK, NY - SEPTEMBER 09: Juan Martin del Potro of Argentina discusses a situation with chair umpire Alison Hughes during his men's Singles finals match against Novak Djokovic of Serbia on Day Fourteen of the 2018 US Open at the USTA Billie Jean King National Tennis Center on September 9, 2018 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Al Bello/Getty Images) (Source: Al Bello)
MILTON KEYNES, ENGLAND - SEPTEMBER 26: Christian Kabasele of Watford is shown the red card by referee Lee Mason after tackling Dele Alli during the Carabao Cup Third Round match between Tottenham Hotspur and Watford at Stadium mk on September 26, 2018 in Milton Keynes, England. (Photo by David Rogers/Getty Images)
MILTON KEYNES, ENGLAND - SEPTEMBER 26: Christian Kabasele of Watford is shown the red card by referee Lee Mason after tackling Dele Alli during the Carabao Cup Third Round match between Tottenham Hotspur and Watford at Stadium mk on September 26, 2018 in Milton Keynes, England. (Photo by David Rogers/Getty Images) (Source: David Rogers)
JACKSONVILLE, FL - SEPTEMBER 30: A referee watches a replay during the game between the Jacksonville Jaguars and the New York Jets on September 30, 2018 in Jacksonville, Florida. (Photo by Sam Greenwood/Getty Images)
JACKSONVILLE, FL - SEPTEMBER 30: A referee watches a replay during the game between the Jacksonville Jaguars and the New York Jets on September 30, 2018 in Jacksonville, Florida. (Photo by Sam Greenwood/Getty Images) (Source: Sam Greenwood)
BARCELONA, SPAIN - SEPTEMBER 29: The referee Jaime Latre listrens the VAR during the La Liga match between FC Barcelona and Athletic Club at Camp Nou on September 29, 2018 in Barcelona, Spain. (Photo by David Ramos/Getty Images)
BARCELONA, SPAIN - SEPTEMBER 29: The referee Jaime Latre listrens the VAR during the La Liga match between FC Barcelona and Athletic Club at Camp Nou on September 29, 2018 in Barcelona, Spain. (Photo by David Ramos/Getty Images) (Source: David Ramos)
ATLANTA, GA - SEPTEMBER 23: Referee Walt Anderson checks replays during overtime of the game between the New Orleans Saints and the Atlanta Falcons at Mercedes-Benz Stadium on September 23, 2018 in Atlanta, Georgia. (Photo by Scott Cunningham/Getty Images)
ATLANTA, GA - SEPTEMBER 23: Referee Walt Anderson checks replays during overtime of the game between the New Orleans Saints and the Atlanta Falcons at Mercedes-Benz Stadium on September 23, 2018 in Atlanta, Georgia. (Photo by Scott Cunningham/Getty Images) (Source: Scott Cunningham)
LOS ANGELES, CA - SEPTEMBER 27: Quarterback Kirk Cousins #8 of the Minnesota Vikings argues with referee Brad Allen #122 over a penalty during the first quarter against the Los Angeles Rams at Los Angeles Memorial Coliseum on September 27, 2018 in Los Angeles, California. (Photo by Harry How/Getty Images)
LOS ANGELES, CA - SEPTEMBER 27: Quarterback Kirk Cousins #8 of the Minnesota Vikings argues with referee Brad Allen #122 over a penalty during the first quarter against the Los Angeles Rams at Los Angeles Memorial Coliseum on September 27, 2018 in Los Angeles, California. (Photo by Harry How/Getty Images) (Source: Harry How)
PACHUCA, MEXICO - SEPTEMBER 29: Fernando Guerrero, central referee, in action during the 11th round match between Pachuca and Cruz Azul as part of the Torneo Apertura 2018 Liga MX at Hidalgo Stadium on September 29, 2018 in Pachuca, Mexico. (Photo by Manuel Velasquez/Getty Images)
PACHUCA, MEXICO - SEPTEMBER 29: Fernando Guerrero, central referee, in action during the 11th round match between Pachuca and Cruz Azul as part of the Torneo Apertura 2018 Liga MX at Hidalgo Stadium on September 29, 2018 in Pachuca, Mexico. (Photo by Manuel Velasquez/Getty Images) (Source: Manuel Velasquez)
LONDON, ENGLAND - SEPTEMBER 22: The referee stops the fight as Shakhram Giyasov knocks out Julio Laguna during the 8x 3minute rounds Welterweight Contest between Shakhram Giyasov and Julio Laguna at Wembley Stadium on September 22, 2018 in London, England. (Photo by Richard Heathcote/Getty Images)
LONDON, ENGLAND - SEPTEMBER 22: The referee stops the fight as Shakhram Giyasov knocks out Julio Laguna during the 8x 3minute rounds Welterweight Contest between Shakhram Giyasov and Julio Laguna at Wembley Stadium on September 22, 2018 in London, England. (Photo by Richard Heathcote/Getty Images) (Source: Richard Heathcote)
MEXICO CITY, MEXICO - SEPTEMBER 30: Miguel Herrera coach of America argues with referee Cesar Ramos during the 11th round match between America and Chivas as part of the Torneo Apertura 2018 Liga MX at Azteca Stadium on September 30, 2018 in Mexico City, Mexico. (Photo by Hector Vivas/Getty Images)
MEXICO CITY, MEXICO - SEPTEMBER 30: Miguel Herrera coach of America argues with referee Cesar Ramos during the 11th round match between America and Chivas as part of the Torneo Apertura 2018 Liga MX at Azteca Stadium on September 30, 2018 in Mexico City, Mexico. (Photo by Hector Vivas/Getty Images) (Source: Hector Vivas)
MILWAUKEE, WI - SEPTEMBER 28: Jesus Aguilar #24 of the Milwaukee Brewers argues a call with umpire Alfonso Marquez #72 during the fifth inning of a game against the Detroit Tigers at Miller Park on September 28, 2018 in Milwaukee, Wisconsin. (Photo by Stacy Revere/Getty Images)
MILWAUKEE, WI - SEPTEMBER 28: Jesus Aguilar #24 of the Milwaukee Brewers argues a call with umpire Alfonso Marquez #72 during the fifth inning of a game against the Detroit Tigers at Miller Park on September 28, 2018 in Milwaukee, Wisconsin. (Photo by Stacy Revere/Getty Images) (Source: Stacy Revere)
BALTIMORE, MD - SEPTEMBER 28: Manager AJ Hinch #14 of the Houston Astros talks with home plate umpire Bill Miller #26 during the first inning of the game against the Baltimore Orioles at Oriole Park at Camden Yards on September 28, 2018 in Baltimore, Maryland. (Photo by Greg Fiume/Getty Images)
BALTIMORE, MD - SEPTEMBER 28: Manager AJ Hinch #14 of the Houston Astros talks with home plate umpire Bill Miller #26 during the first inning of the game against the Baltimore Orioles at Oriole Park at Camden Yards on September 28, 2018 in Baltimore, Maryland. (Photo by Greg Fiume/Getty Images) (Source: Greg Fiume)
ST. PETERSBURG, FL - SEPTEMBER 26: Home plate umpire Greg Gibson #53 calles Andrew Velazquez #11 of the Tampa Bay Rays safe ahead of a tag from Gary Sanchez #24 of the New York Yankees in the eighth inning of a baseball game at Tropicana Field on September 26, 2018 in St. Petersburg, Florida. (Photo by Mike Carlson/Getty Images)
ST. PETERSBURG, FL - SEPTEMBER 26: Home plate umpire Greg Gibson #53 calles Andrew Velazquez #11 of the Tampa Bay Rays safe ahead of a tag from Gary Sanchez #24 of the New York Yankees in the eighth inning of a baseball game at Tropicana Field on September 26, 2018 in St. Petersburg, Florida. (Photo by Mike Carlson/Getty Images) (Source: Mike Carlson)
NEW YORK, NY - SEPTEMBER 09: Novak Djokovic of Serbia discusses a situation with chair umpire Alison Hughes during his men's Singles finals match against Juan Martin del Potro of Argentina on Day Fourteen of the 2018 US Open at the USTA Billie Jean King National Tennis Center on September 9, 2018 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Julian Finney/Getty Images)
NEW YORK, NY - SEPTEMBER 09: Novak Djokovic of Serbia discusses a situation with chair umpire Alison Hughes during his men's Singles finals match against Juan Martin del Potro of Argentina on Day Fourteen of the 2018 US Open at the USTA Billie Jean King National Tennis Center on September 9, 2018 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Julian Finney/Getty Images) (Source: Julian Finney)
FLORENCE, ITALY - SEPTEMBER 30: Paolo Valeri referee during the Serie A match between ACF Fiorentina and Atalanta BC at Stadio Artemio Franchi on September 30, 2018 in Florence, Italy. (Photo by Gabriele Maltinti/Getty Images)
FLORENCE, ITALY - SEPTEMBER 30: Paolo Valeri referee during the Serie A match between ACF Fiorentina and Atalanta BC at Stadio Artemio Franchi on September 30, 2018 in Florence, Italy. (Photo by Gabriele Maltinti/Getty Images) (Source: Gabriele Maltinti)
SAN DIEGO, CA - SEPTEMBER 08: A referee reminds everyone that it is thrid down in the first half between the San Diego State Aztecs and the Sacramento State Hornets at SDCCU Stadium on September 8, 2018 in San Diego, California. (Photo by Kent Horner/Getty Images)
SAN DIEGO, CA - SEPTEMBER 08: A referee reminds everyone that it is thrid down in the first half between the San Diego State Aztecs and the Sacramento State Hornets at SDCCU Stadium on September 8, 2018 in San Diego, California. (Photo by Kent Horner/Getty Images) (Source: Kent Horner)