Australian Nick Kyrgios produced another extraordinary performance to demolish compatriot Alex de Minaur 6-2 6-3 at the Canadian Masters on Thursday, a day after stunning world number one Daniil Medvedev.

Following are reactions to Serena Williams announcing on Tuesday that she plans to retire from the sport following the U.S. Open:

Four-time Grand Slam champion Naomi Osaka retired from her opening match on Tuesday at the WTA Toronto Masters with lower back pain, raising injury concerns with the US Open looming.

Serena Williams said on Tuesday she was "evolving away from tennis" and planned to retire from the sport she dominated with 23 Grand Slam titles following the U.S. Open tournament, which begins later this month.

Serena Williams stepped onto a hardcourt for the first time in a year and a half on Monday and fought through for a 6-3, 6-4 victory over Spain's Nuria Parrizas Diaz.

Daniil Medvedev said he tried to use the extra time away from the court to his advantage after Wimbledon banned Russian and Belarusian players from the grass court major in light of Russia's invasion of Ukraine.

Daria Kasatkina was rewarded for her victory in San Jose at the weekend with a return to the top 10 for the first time since 2019, when the WTA rankings were released on Monday.

World number one Daniil Medvedev won his first ATP title of 2022 on Saturday, roaring past defending champion Cameron Norrie 7-5, 6-0 in the final of the hardcourt tournament in Los Cabos, Mexico.

Daniil Medvedev will arrive in New York for his U.S. Open title defence this month as the top seed after the Russian confirmed his stay as world number one by reaching the final in Los Cabos, Mexico on Friday.

Wimbledon champion Novak Djokovic, whose refusal to be vaccinated against Covid makes him unable to enter Canada, has officially withdrawn from the ATP hardcourt tournament in Montreal, organizers said Thursday.

World number one Daniil Medvedev, playing his first match in six weeks, beat Australian qualifier Rinky Hijikata 6-4, 6-3 on Wednesday at the ATP hard court tournament in Los Cabos, Mexico.

Emma Raducanu may be undecided on who her next permanent coach should be, but the British teenager has no uncertainty when it comes to selecting which house she identifies with at the mythical Hogwarts School of Witchcraft and Wizardry.

Four-time Grand Slam champion Naomi Osaka made a triumphant return from a two-month layoff by defeating Chinese teen Zheng Qinwen on Tuesday at the WTA San Jose hardcourt tournament.

Reigning Wimbledon champion Elena Rybakina of Kazakhstan lost to seventh seed Daria Kasatkina on Monday in a first-round match at the WTA San Jose hardcourt tournament.

Jannik Sinner defeated Spanish teenager Carlos Alcaraz for the second time in four weeks on Sunday to take the Spaniard's Umag clay-court title.

Defending champion Carlos Alcaraz survived a worrying ankle injury scare to beat Giulio Zeppieri and set-up an Umag final showdown against Jannik Sinner, the man who ended his Wimbledon hopes.

Novak Djokovic said Saturday he is "preparing to compete" at the US Open even though his refusal to get vaccinated will see him barred from entering the country.

San Marino's Domenico Vicini is pushing 51, but that hasn't stopped him becoming the first man to compete in 100 Davis Cup ties and he has vowed to keep playing.

Wimbledon runner-up Nick Kyrgios has been handed a wildcard into next month's U.S. Open tune-up event in Cincinnati, Ohio, organisers of the Western & Southern Open said on Monday.

The emotions of lifting his maiden Tour-level trophy will be hard to forget for 20-year-old Italian Lorenzo Musetti, who overcame disrupted preparations and survived a rollercoaster ride at the ATP 500 event in Hamburg.