Australia's Nick Kyrgios has withdrawn from the inaugural edition of the United Cup due to injury, organisers of the new mixed team event said on Wednesday.
Kyrgios, who is ranked 22nd in the world and reached this year's Wimbledon final, was set to lead Australia in the joint ATP and WTA event, which is being held in Sydney, Brisbane and Perth and offers ranking points and $15 million in prize-money.
"Nick Kyrgios has withdrawn from the United Cup due to injury," organisers said in a statement without elaborating on the nature of the injury.
"Alex de Minaur will move into the number one men's position for Team Australia, and subsequently Jason Kubler moves into the number two spot."
Kyrgios, 27, had been due to face Britain's Cameron Norrie in his first singles match on Thursday in Group D, which also features Rafa Nadal's Spain.
The tournament, which runs from Dec. 29-Jan. 8, features 18 countries split into six groups of three, with teams playing two men's and two women's singles matches and a mixed doubles match.
Formula One stewards handed Haas rookie driver Oliver Bearman a 10-place grid drop for his first home British Grand Prix for failing to comply with red warning flags in Saturday's final practice.
Seventh seed Mirra Andreeva outclassed American Hailey Baptiste 6-1 6-3 under the Court One roof to equal her best Wimbledon run by reaching the last 16 on Saturday.
Carrying a red floral wreath bearing his shirt number, Diogo Jota's Liverpool teammates joined relatives and residents in a small Portuguese town on Saturday for the funeral of the football star, who died with his brother in a car crash on Thursday.
An 83rd-minute Weverton own goal from a deflected Malo Gusto cross gave Chelsea a nervy 2-1 win over a spirited Palmeiras side in the Club World Cup quarter-finals on Friday.
Women's top seed Aryna Sabalenka fought off inspired home favourite Emma Raducanu in a cauldron-like Centre Court atmosphere to keep her Wimbledon quest on track but it was the end of the road for two other Grand Slam champions on Friday.