Argentine Gisela Dulko and Italy's Flavia Pennetta beat Eastern Europeans Victoria Azarenka and Maria Kirilenko 2-6, 7-5, 6-1 to win the Australian Open women's doubles titles on Friday.
Former World No. 1 Serena Williams gave the United States a commanding 2-0 lead over Belarus in their Fed Cup tie on Saturday after top ranked Victoria Azarenka was unable to compete for the eastern Europeans because of a sore lower back.
Serena Williams marked her first European appearance of the season with victory on the Madrid Open's striking blue clay courts on Monday, but her sister Venus crashed out in the second round.
Aryna Sabalenka rose above geopolitical tumult to become the first player to claim a Grand Slam title as a neutral at the Australian Open.
Klitschko and his brother Vitali, also a former world heavyweight champion and now the mayor of Kyiv, have both taken up arms against invading Russian forces.
Roger Federer suffered a shock 3-6, 6-3, 7-6(4) defeat to Australian wildcard Thanasi Kokkinakis on Saturday that will cost the Swiss his world number one ranking and leaves the Miami men's tournament wide open.
A summary of sports events and persons who made news on Sunday