Visitors observe the tiger William at Rio de Janeiro's BioParque do Rio biopark, a revamped version of the old Zoo, amid the coronavirus disease (COVID-19) pandemic, Brazil, May 12, 2021. Picture taken May 12, 2021. REUTERS/Ricardo Moraes

Visitors observe the tiger William at Rio de Janeiro's BioParque do Rio biopark, a revamped version of the old Zoo, amid the coronavirus disease (COVID-19) pandemic, Brazil, May 12, 2021. Picture taken May 12, 2021. REUTERS/Ricardo Moraes

Visitors observe the tiger William at in Rio de Janeiro's BioParque do Rio biopark, a revamped version of the old Zoo, amid the coronavirus disease (COVID-19) pandemic, Brazil, May 12, 2021. Picture taken May 12, 2021. REUTERS/Ricardo Moraes

A Russian service member drives a Tiger-M all-terrain armoured vehicle, with a Yars intercontinental ballistic missile system seen in the background, during a military parade on Victory Day, which marks the 76th anniversary of the victory over Nazi Germany in World War Two, in Red Square in central Moscow, Russia May 9, 2021. REUTERS/Maxim Shemetov

Russian service members drive Tiger-M, Patrol AV and Typhoon-K all-terrain armoured vehicles during a military parade on Victory Day, which marks the 76th anniversary of the victory over Nazi Germany in World War Two, in Red Square in central Moscow, Russia May 9, 2021. REUTERS/Maxim Shemetov

Rugby Union - Premiership - Sale Sharks v Leicester Tigers - AJ Bell Stadium, Eccles, Britain - May 7, 2021 Sale Sharks Byron McGuigan and Sale Sharks Luke James in action with Leicester Tigers Kobus Van Wyk and Zack Henry Action Images/Jason Cairnduff

Rugby Union - Premiership - Sale Sharks v Leicester Tigers - AJ Bell Stadium, Eccles, Britain - May 7, 2021 Sale Sharks' Faf De Clerk Action Images/Jason Cairnduff

Rugby Union - Premiership - Sale Sharks v Leicester Tigers - AJ Bell Stadium, Eccles, Britain - May 7, 2021 Medical staff is seen during the match Action Images/Jason Cairnduff

Rugby Union - Premiership - Sale Sharks v Leicester Tigers - AJ Bell Stadium, Eccles, Britain - May 7, 2021 Sale Sharks' Faf De Clerk Action Images/Jason Cairnduff

Rugby Union - Premiership - Sale Sharks v Leicester Tigers - AJ Bell Stadium, Eccles, Britain - May 7, 2021 Sale Sharks' Marland Yarde Action Images/Jason Cairnduff

Rugby Union - Premiership - Sale Sharks v Leicester Tigers - AJ Bell Stadium, Eccles, Britain - May 7, 2021 Sale Sharks AJ MacGinty converts a try Action Images/Jason Cairnduff

Rugby Union - Premiership - Sale Sharks v Leicester Tigers - AJ Bell Stadium, Eccles, Britain - May 7, 2021 Leicester Tigers Zach Henry in action with Sale Sharks Faf De Clerk Action Images/Jason Cairnduff

Rugby Union - Premiership - Sale Sharks v Leicester Tigers - AJ Bell Stadium, Eccles, Britain - May 7, 2021 Leicester Tigers Zach Henry in action with Sale Sharks Faf De Clerk Action Images/Jason Cairnduff

Rugby Union - Premiership - Sale Sharks v Leicester Tigers - AJ Bell Stadium, Eccles, Britain - May 7, 2021 Sale Sharks Byron McGuigan scores their first try Action Images/Jason Cairnduff

Rugby Union - Premiership - Sale Sharks v Leicester Tigers - AJ Bell Stadium, Eccles, Britain - May 7, 2021 Sale Sharks Byron McGuigan in action with Leicester Tigers Zach Henry and Matias Moroni Action Images/Jason Cairnduff

Rugby Union - Premiership - Sale Sharks v Leicester Tigers - AJ Bell Stadium, Eccles, Britain - May 7, 2021 Sale Sharks Byron McGuigan scores their first try Action Images/Jason Cairnduff

Rugby Union - Premiership - Sale Sharks v Leicester Tigers - AJ Bell Stadium, Eccles, Britain - May 7, 2021 Leicester Tigers Johnny Phillips in action with Sale Sharks Marland Yarde Action Images/Jason Cairnduff

Rugby Union - Premiership - Sale Sharks v Leicester Tigers - AJ Bell Stadium, Eccles, Britain - May 7, 2021 Sale Sharks Tom Curry in action Action Images/Jason Cairnduff

Rugby Union - Premiership - Sale Sharks v Leicester Tigers - AJ Bell Stadium, Eccles, Britain - May 7, 2021 Sale Sharks Byron McGuigan scores their first try Action Images/Jason Cairnduff

Malayan tiger named Wira plays with a box during it's 2nd birthday celebration at National Zoo in Kuala Lumpur, Malaysia May 1, 2021. REUTERS/Lim Huey Teng

Malayan tiger named Wira reacts during it's 2nd birthday celebration at National Zoo in Kuala Lumpur, Malaysia May 1, 2021. REUTERS/Lim Huey Teng

A White Bengal Tiger is seen resting inside a pool at National Zoo in Kuala Lumpur, Malaysia May 1, 2021. REUTERS/Lim Huey Teng

Malayan tiger named Wira looks at its birthday cake during its 2nd birthday celebration at National Zoo in Kuala Lumpur, Malaysia May 1, 2021. REUTERS/Lim Huey Teng

A Malayan Tiger interacts with a zookeeper inside a cage at the National Zoo in Kuala Lumpur, Malaysia May 1, 2021. REUTERS/Lim Huey Teng

A Malayan Tiger is seen inside a cage at the National Zoo in Kuala Lumpur, Malaysia May 1, 2021. REUTERS/Lim Huey Teng

Malayan tiger named Wira is seen with it's birthday cake during it's 2nd birthday celebration at National Zoo in Kuala Lumpur, Malaysia May 1, 2021. REUTERS/Lim Huey Teng

Malayan tiger named Wira and it's brother Hebat are seen during their 2nd birthday celebration at National Zoo in Kuala Lumpur, Malaysia May 1, 2021. REUTERS/Lim Huey Teng

Malayan tiger named Hebat smells a happy birthday sign during it's 2nd birthday celebration at National Zoo in Kuala Lumpur, Malaysia May 1, 2021. REUTERS/Lim Huey Teng

Malayan tiger named Wira tastes a meat cake during its 2nd birthday celebration at National Zoo in Kuala Lumpur, Malaysia May 1, 2021. REUTERS/Lim Huey Teng

Rugby Union - European Challenge Cup - Semi Final - Leicester Tigers v Ulster - Welford Road Stadium, Leicester, Britain - April 30, 2021 Leicester Tigers' George Ford and Matias Moroni celebrate after the match Action Images via Reuters/Matthew Childs

Rugby Union - European Challenge Cup - Semi Final - Leicester Tigers v Ulster - Welford Road Stadium, Leicester, Britain - April 30, 2021 Leicester Tigers' Freddie Steward and George Ford celebrate after the match Action Images via Reuters/Matthew Childs

Rugby Union - European Challenge Cup - Semi Final - Leicester Tigers v Ulster - Welford Road Stadium, Leicester, Britain - April 30, 2021 Leicester Tigers' Jasper Wiese in action with Ulster's Kieran Treadwell Action Images via Reuters/Matthew Childs

Rugby Union - European Challenge Cup - Semi Final - Leicester Tigers v Ulster - Welford Road Stadium, Leicester, Britain - April 30, 2021 Leicester Tigers' George Ford in action with Ulster's Jacob Stockdale Action Images via Reuters/Matthew Childs

Rugby Union - European Challenge Cup - Semi Final - Leicester Tigers v Ulster - Welford Road Stadium, Leicester, Britain - April 30, 2021 Leicester Tigers' George Ford in action with Ulster's James Hume Action Images via Reuters/Matthew Childs

Rugby Union - European Challenge Cup - Semi Final - Leicester Tigers v Ulster - Welford Road Stadium, Leicester, Britain - April 30, 2021 Leicester Tigers' Tomas Lavanini in action with Ulster's Tom O'Toole Action Images via Reuters/Matthew Childs

Rugby Union - European Challenge Cup - Semi Final - Leicester Tigers v Ulster - Welford Road Stadium, Leicester, Britain - April 30, 2021 Leicester Tigers' Freddie Steward in action with Ulster's Sean Reidy Action Images via Reuters/Matthew Childs

Rugby Union - European Challenge Cup - Semi Final - Leicester Tigers v Ulster - Welford Road Stadium, Leicester, Britain - April 30, 2021 Leicester Tigers' Hanro Liebenberg in action with Ulster's James Hume Action Images via Reuters/Matthew Childs

Rugby Union - European Challenge Cup - Semi Final - Leicester Tigers v Ulster - Welford Road Stadium, Leicester, Britain - April 30, 2021 Ulster's Tom O'Toole in action Action Images via Reuters/Matthew Childs

Rugby Union - European Challenge Cup - Semi Final - Leicester Tigers v Ulster - Welford Road Stadium, Leicester, Britain - April 30, 2021 Leicester Tigers' George Ford in action with Ulster's Iain Henderson Action Images via Reuters/Matthew Childs

Rugby League - Super League - Salford Red Devils v Castleford Tigers - AJ Bell Stadium, Eccles, Britain - April 30, 2021 Castleford Tiger's players clash with Salford Red Devils' players Action Images/Molly Darlington

Rugby League - Super League - Salford Red Devils v Castleford Tigers - AJ Bell Stadium, Eccles, Britain - April 30, 2021 Castleford Tigers' Liam Watts clashes with Salford Red Devils' Elliot Kear Action Images/Molly Darlington

Rugby Union - European Challenge Cup - Semi Final - Leicester Tigers v Ulster - Welford Road Stadium, Leicester, Britain - April 30, 2021 Leicester Tigers' Nemani Nadolo in action with Ulster's Will Addison Action Images via Reuters/Matthew Childs

Rugby Union - European Challenge Cup - Semi Final - Leicester Tigers v Ulster - Welford Road Stadium, Leicester, Britain - April 30, 2021 Leicester Tigers' Cyle Brink in action with Ulster's Stuart McCloskey Action Images via Reuters/Matthew Childs

Rugby Union - European Challenge Cup - Semi Final - Leicester Tigers v Ulster - Welford Road Stadium, Leicester, Britain - April 30, 2021 Ulster's Will Addison in action Action Images via Reuters/Matthew Childs

Rugby Union - European Challenge Cup - Semi Final - Leicester Tigers v Ulster - Welford Road Stadium, Leicester, Britain - April 30, 2021 Leicester Tigers' Freddie Steward in action Action Images via Reuters/Matthew Childs

Rugby Union - European Challenge Cup - Semi Final - Leicester Tigers v Ulster - Welford Road Stadium, Leicester, Britain - April 30, 2021 Leicester Tigers' Jasper Wiese in action with Ulster's Nick Timoney Action Images via Reuters/Matthew Childs

Rugby League - Super League - Salford Red Devils v Castleford Tigers - AJ Bell Stadium, Eccles, Britain - April 30, 2021 Castleford Tigers' Jake Trueman scores their fourth try Action Images/Molly Darlington

Rugby League - Super League - Salford Red Devils v Castleford Tigers - AJ Bell Stadium, Eccles, Britain - April 30, 2021 Castleford Tigers' Jake Trueman in action Action Images/Molly Darlington

Rugby League - Super League - Salford Red Devils v Castleford Tigers - AJ Bell Stadium, Eccles, Britain - April 30, 2021 Castleford Tigers' Jake Trueman in action Action Images/Molly Darlington

Rugby Union - European Challenge Cup - Semi Final - Leicester Tigers v Ulster - Welford Road Stadium, Leicester, Britain - April 30, 2021 Leicester Tigers' Jasper Wiese in action with Ulster's Alan O'Connor Action Images via Reuters/Matthew Childs

Rugby League - Super League - Salford Red Devils v Castleford Tigers - AJ Bell Stadium, Eccles, Britain - April 30, 2021 Castleford Tigers' Jake Trueman in action Action Images/Molly Darlington

Rugby League - Super League - Salford Red Devils v Castleford Tigers - AJ Bell Stadium, Eccles, Britain - April 30, 2021 Castleford Tigers' Jake Trueman in action Action Images/Molly Darlington

Rugby League - Super League - Salford Red Devils v Castleford Tigers - AJ Bell Stadium, Eccles, Britain - April 30, 2021 Castleford Tigers' Liam Watts in action Action Images/Molly Darlington

Rugby League - Super League - Salford Red Devils v Castleford Tigers - AJ Bell Stadium, Eccles, Britain - April 30, 2021 Castleford Tigers' Liam Watts in action Action Images/Molly Darlington

Rugby League - Super League - Salford Red Devils v Castleford Tigers - AJ Bell Stadium, Eccles, Britain - April 30, 2021 Castleford Tigers' Cheyse Blair scores their third try Action Images/Molly Darlington

Rugby Union - European Challenge Cup - Semi Final - Leicester Tigers v Ulster - Welford Road Stadium, Leicester, Britain - April 30, 2021 Leicester Tigers' Jasper Wiese in action with Ulster's Alan O'Connor Action Images via Reuters/Matthew Childs

Rugby Union - European Challenge Cup - Semi Final - Leicester Tigers v Ulster - Welford Road Stadium, Leicester, Britain - April 30, 2021 Leicester Tigers' Tom Youngs in action with Ulster's John Cooney Action Images via Reuters/Matthew Childs

Rugby League - Super League - Salford Red Devils v Castleford Tigers - AJ Bell Stadium, Eccles, Britain - April 30, 2021 Salford Red Devils' Andy Ackers scores their second try Action Images/Molly Darlington

Rugby Union - European Challenge Cup - Semi Final - Leicester Tigers v Ulster - Welford Road Stadium, Leicester, Britain - April 30, 2021 Leicester Tigers' Nemani Nadolo in action with Ulster's John Cooney REUTERS/Matthew Childs

Rugby Union - European Challenge Cup - Semi Final - Leicester Tigers v Ulster - Welford Road Stadium, Leicester, Britain - April 30, 2021 Leicester Tigers' George Ford in action with Ulster's Eric O'Sullivan REUTERS/Matthew Childs