Athletics - Serbian Open Indoor Meeting 2021 - Belgrade, Serbia - February 24, 2021 Sweden's Armand Duplantis celebrates during the Men's Pole Vault REUTERS/Marko Djurica

Athletics - Serbian Open Indoor Meeting 2021 - Belgrade, Serbia - February 24, 2021 Sweden's Armand Duplantis reacts during the Men's Pole Vault REUTERS/Marko Djurica

Athletics - Serbian Open Indoor Meeting 2021 - Belgrade, Serbia - February 24, 2021 Sweden's Armand Duplantis in action during the Men's Pole Vault REUTERS/Marko Djurica

Athletics - Serbian Open Indoor Meeting 2021 - Belgrade, Serbia - February 24, 2021 Sweden's Armand Duplantis in action during the Men's Pole Vault REUTERS/Marko Djurica

Athletics - Serbian Open Indoor Meeting 2021 - Belgrade, Serbia - February 24, 2021 Sweden's Armand Duplantis in action during the Men's Pole Vault REUTERS/Marko Djurica

Athletics - Serbian Open Indoor Meeting 2021 - Belgrade, Serbia - February 24, 2021 Sweden's Armand Duplantis in action during the Men's Pole Vault REUTERS/Marko Djurica

Athletics - Serbian Open Indoor Meeting 2021 - Belgrade, Serbia - February 24, 2021 Sweden's Armand Duplantis in action during the Men's Pole Vault REUTERS/Marko Djurica

Athletics - Serbian Open Indoor Meeting 2021 - Belgrade, Serbia - February 24, 2021 Sweden's Armand Duplantis waves during the Men's Pole Vault REUTERS/Marko Djurica

Athletics - Serbian Open Indoor Meeting 2021 - Belgrade, Serbia - February 24, 2021 Sweden's Armand Duplantis reacts during the Men's Pole Vault REUTERS/Marko Djurica

Athletics - Serbian Open Indoor Meeting 2021 - Belgrade, Serbia - February 24, 2021 Sweden's Armand Duplantis reacts during the Men's Pole Vault REUTERS/Marko Djurica

Athletics - Serbian Open Indoor Meeting 2021 - Belgrade, Serbia - February 24, 2021 Sweden's Armand Duplantis in action during the Men's Pole Vault REUTERS/Marko Djurica

Athletics - Serbian Open Indoor Meeting 2021 - Belgrade, Serbia - February 24, 2021 Sweden's Armand Duplantis in action during the Men's Pole Vault REUTERS/Marko Djurica

Athletics - Serbian Open Indoor Meeting 2021 - Belgrade, Serbia - February 24, 2021 Sweden's Armand Duplantis in action during the Men's Pole Vault REUTERS/Marko Djurica

Athletics - Serbian Open Indoor Meeting 2021 - Belgrade, Serbia - February 24, 2021 Sweden's Armand Duplantis in action during the Men's Pole Vault REUTERS/Marko Djurica

Athletics - Serbian Open Indoor Meeting 2021 - Belgrade, Serbia - February 24, 2021 Sweden's Armand Duplantis before the Men's Pole Vault REUTERS/Marko Djurica

Athletics - Serbian Open Indoor Meeting 2021 - Belgrade, Serbia - February 24, 2021 Sweden's Armand Duplantis before the Men's Pole Vault REUTERS/Marko Djurica

Medical technicians take a break at the Institute for Forensic Medicine of Belgrade's Medical Faculty, in Belgrade, Serbia, February 22, 2021. Picture taken February 22, 2021. REUTERS/Marko Djurica

A forensic pathologist takes a swab from a body for a coronavirus disease (COVID-19) test at the Institute for Forensic Medicine of Belgrade's Medical Faculty, in Belgrade, Serbia, February 22, 2021. Picture taken February 22, 2021. REUTERS/Marko Djurica

A medical technician works at the Institute for Forensic Medicine of Belgrade's Medical Faculty, in Belgrade, Serbia, February 22, 2021. Picture taken February 22, 2021. REUTERS/Marko Djurica

A medical technician works at the Institute for Forensic Medicine of Belgrade's Medical Faculty, in Belgrade, Serbia, February 22, 2021. Picture taken February 22, 2021. REUTERS/Marko Djurica

A medical technician works at the Institute for Forensic Medicine of Belgrade's Medical Faculty, in Belgrade, Serbia, February 22, 2021. Picture taken February 22, 2021. REUTERS/Marko Djurica

Milenko Bogdanovic, a forensic pathologist looks at a body at the Institute for Forensic Medicine of Belgrade's Medical Faculty, in Belgrade, Serbia, February 22, 2021. Picture taken February 22, 2021. REUTERS/Marko Djurica

Milenko Bogdanovic, a forensic pathologist works at the Institute for Forensic Medicine of Belgrade's Medical Faculty, in Belgrade, Serbia, February 22, 2021. Picture taken February 22, 2021. REUTERS/Marko Djurica

A forensic toxicology chemist works at the Institute for Forensic Medicine of Belgrade's Medical Faculty, in Belgrade, Serbia, February 22, 2021. Picture taken February 22, 2021. REUTERS/Marko Djurica

A forensic toxicology chemist works at the Institute for Forensic Medicine of Belgrade's Medical Faculty, in Belgrade, Serbia, February 22, 2021. Picture taken February 22, 2021. REUTERS/Marko Djurica

A forensic toxicology chemist works at the Institute for Forensic Medicine of Belgrade's Medical Faculty, in Belgrade, Serbia, February 22, 2021. Picture taken February 22, 2021. REUTERS/Marko Djurica

Milenko Bogdanovic, a forensic pathologist poses for a picture at the Institute for Forensic Medicine of Belgrade's Medical Faculty, in Belgrade, Serbia, February 18, 2021. Picture taken February 18, 2021. REUTERS/Marko Djurica

Milenko Bogdanovic, a forensic pathologist works at the Institute for Forensic Medicine of Belgrade's Medical Faculty, in Belgrade, Serbia, February 22, 2021. Picture taken February 22, 2021. REUTERS/Marko Djurica

A picture of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, is projected on the walls of Petrovaradin fortress by the Danube river as people mourn after his death from the coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

People mourn the death of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, by the Danube river after he died from the coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

People mourn the death of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, by the Danube river after he died from the coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

People mourn the death of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, by the Danube river after he died from the coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

People mourn the death of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, by the Danube river after he died from the coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

A picture of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, is projected on the walls of Petrovaradin fortress by the Danube river as people mourn after his death from the coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

A picture of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, is projected on the walls of Petrovaradin fortress by the Danube river as people mourn after his death from the coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

People mourn the death of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, by the Danube river after he died from the coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

People mourn the death of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, by the Danube river after he died from the coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

People mourn the death of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, by the Danube river after he died from the coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

A picture of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, is projected on the walls of Petrovaradin fortress by the Danube river as people moun his death after he died from coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

A picture of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, is projected on the walls of Petrovaradin fortress by the Danube river as people mourn after his death from the coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

A picture of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, is projected on the walls of Petrovaradin fortress by the Danube river as people mourn after his death from the coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

A picture of Djordje Balasevic, a Serbian singer who remained widely popular throughout the former Yugoslavia, is projected on the walls of Petrovaradin fortress by the Danube river as people mourn after his death from the coronavirus disease (COVID-19), in Novi Sad, Serbia, February 22, 2021. REUTERS/Marko Djurica

A healthcare worker administers a dose of the Sputnik V coronavirus disease (COVID-19) vaccine to her colleague in Podgorica, Montenegro, February 22, 2021. REUTERS/Stevo Vasiljevic

A healthcare worker administers a dose of the Sputnik V coronavirus disease (COVID-19) vaccine to her colleague in Podgorica, Montenegro, February 22, 2021. REUTERS/Stevo Vasiljevic

A healthcare worker prepares to administer a dose of the Sputnik V coronavirus disease (COVID-19) vaccine to her colleague in Podgorica, Montenegro, February 22, 2021. REUTERS/Stevo Vasiljevic

Healthcare workers prepare to administer a dose of the Sputnik V coronavirus disease (COVID-19) vaccine to their colleagues in Podgorica, Montenegro, February 22, 2021. REUTERS/Stevo Vasiljevic

A healthcare worker prepares to administer a dose of the Sputnik V coronavirus disease (COVID-19) vaccine to her colleague in Podgorica, Montenegro, February 22, 2021. REUTERS/Stevo Vasiljevic

A healthcare worker administers a dose of the Sputnik V coronavirus disease (COVID-19) vaccine to her colleague in Podgorica, Montenegro, February 22, 2021. REUTERS/Stevo Vasiljevic

Ampules with the Sputnik V coronavirus disease (COVID-19) vaccine are seen in Podgorica, Montenegro, February 22, 2021. REUTERS/Stevo Vasiljevic

A healthcare worker shows an ampule with the Sputnik V coronavirus disease (COVID-19) vaccine in Podgorica, Montenegro, February 22, 2021. REUTERS/Stevo Vasiljevic

Ampules with the Sputnik V coronavirus disease (COVID-19) vaccine are seen in Podgorica, Montenegro, February 22, 2021. REUTERS/Stevo Vasiljevic

A healthcare worker administers a dose of the Sputnik V coronavirus disease (COVID-19) vaccine to her colleague in Podgorica, Montenegro, February 22, 2021. REUTERS/Stevo Vasiljevic

A healthcare worker takes a photo while her colleague administers a dose of the Sputnik V coronavirus disease (COVID-19) vaccine in Podgorica, Montenegro, February 22, 2021. REUTERS/Stevo Vasiljevic

Biathlon - IBU Biathlon World Championships - Pokljuka, Slovenia - February 21, 2021 Norway's Sturla Holm Laegreid in action during the Men's 15km Mass Start REUTERS/Borut Zivulovic

Biathlon - IBU Biathlon World Championships - Pokljuka, Slovenia - February 21, 2021 Norway's Sturla Holm Laegreid in action during the Men's 15km Mass Start REUTERS/Borut Zivulovic

Biathlon - IBU Biathlon World Championships - Pokljuka, Slovenia - February 21, 2021 Norway's Sturla Holm Laegreid in action during the Men's 15km Mass Start REUTERS/Borut Zivulovic

Biathlon - IBU Biathlon World Championships - Pokljuka, Slovenia - February 21, 2021 Norway's Sturla Holm Laegreid in action during the Men's 15km Mass Start REUTERS/Borut Zivulovic

Biathlon - IBU Biathlon World Championships - Pokljuka, Slovenia - February 21, 2021 Norway's Sturla Holm Laegreid poses with his four medals after winning the Men's 15km Mass Start REUTERS/Borut Zivulovic

Biathlon - IBU Biathlon World Championships - Pokljuka, Slovenia - February 21, 2021 France's Quentin Fillon Maillet poses with teammates after finishing in third place in the Men's 15km Mass Start REUTERS/Borut Zivulovic

Biathlon - IBU Biathlon World Championships - Pokljuka, Slovenia - February 21, 2021 Norway's Sturla Holm Laegreid poses with his four medals after winning the Men's 15km Mass Start REUTERS/Borut Zivulovic