The world No. 1 and three-time Grand Slam champion lags behind her contemporaries in endorsements despite standing atop her sport.

An American woman is a champion once again. After having to face the two best players in the world -- Iga Switaek and Aryna Sabalenka -- Madison Keys has claimed her first Grand Slam title at the Australian Open. Keys outlasted Sabalenka in the final on Saturday over three sets to accomplish the feat.

Jannik Sinner joined some of tennis' greatest legends with another stellar performance in the Australian Open final.

Three of the four top seeds will compete for the titles over the weekend, with an American looking to play spoiler

Jannik Sinner and the Australian Open have in common the fact that the only thing that can beat them is to let success go to their heads.

There’s nothing quite like a sporting curse, and this time it seems a legendary actor might have wreaked havoc at the Australian Open.

Madison Keys climbs to No. 7 in WTA rankings after winning her first Grand Slam, while Jannik Sinner retains his No. 1 ATP ranking

Alexander Zverev is into the Australian Open final after Novak Djokovic retired hurt after losing the first set of his clash with the German. The German had taken a tie-break (7-5) when the Serbian called it quits, having struggled with a muscular problem in his left leg. Djokovic was booed as he limped off court.

Top-ranked Jannik Sinner, No. 2 Alexander Zverev, women’s No. 1 Aryna Sabalenka and former No. 1 Naomi Osaka will play exhibition matches March 1-2 in Las Vegas.

Follow live text and radio commentary featuring Jannik Sinner and Novak Djokovic from the Australian Open semi-finals in Melbourne.

Jannik Sinner delivered a dominant performance, beating Alexander Zverev in three sets for his second Australian Open title in a row.