What is your take on another option on the best-of-five Grand Slam matches for men: best three out of four sets and if the match is tied 2–2 then use the 10-point tiebreaker. Same ending as if it's five sets without having to play a fifth set.

Australian Open champion Madison Keys is no longer able to play at a WTA tournament in the U.S. in February, after her success in Melbourne made her too highly ranked to enter. Keys, who rose to world No.

Days after her first Slam title, the tennis star shares what stoked her confidence, how she tweaked her game, and why representation matters on the court.