Australian cricketers pose for a mock photograph ahead of their match against India in Melbourne, Australia, December 24, 2018. /VCG Photo

Star players from three basketball teams who helped their squads win Christmas Day games at the 2018-19 NBA regular season in the U.S., December 25, 2018. /CGTN Photo

Colin O'Brady from the U.S., the first person to compete a solo trek across Antarctica without any assistance, poses with the Geographic South Pole sign after his journey ended on December 26, 2018. /VCG Photo

Swimmers take part in the 48th Boxing Day charity swim on the North Beach, Tenby, Wales, UK, December 26, 2018. /VCG Photo

Swiss tennis player Roger Federer holds a Western Rock Lobster on a beach ahead of the 2019 Hopman Cup in Cervantes, Australia, December 27, 2018. /VCG Photo

American Mikaela Shiffrin celebrates after she cruised to victory with a record 36th slalom triumph during the FIS Alpine Ski World Cup in Semmering, Austria, December 29, 2018. /VCG Photo

Russian President Vladimir Putin (L) plays ice hockey during a friendly match of the Night Hockey League at an ice rink in Red Square, Moscow, Russia, December 29, 2018. /VCG Photo

Serbia's Novak Djokovic kisses his trophy after he beat South Africa's Kevin Anderson to win the Mubadala World Tennis Championship 2018 final in Abu Dhabi, UAE, December 29, 2018. /VCG Photo

Jin Yang (L) and Peng Cheng compete during the China National Figure Skating Championships in Harbin, northeast China's Heilongjiang Province, December 30, 2018. /VCG Photo

French matador Sebastien Castella performs a pass on a bull during a bullfight at the Canaveralejo bullring in Cali, Colombia, December 30, 2018. /VCG Photo