MELBOURNE, Australia — One of them has operated with ruthless efficiency, the other has brought the drama. But Carlos Alcaraz and Novak Djokovic have performed the opposite roles en route to their hotly anticipated Australian Open quarterfinal, which will be played Tuesday January 21 in Melbourne.

Carlos Alcaraz reached his second Australian Open quarter-final after injury-hampered opponent Jack Draper retired while trailing 7-5 6-1 on Sunday. Third seed Alcaraz was well on top in the afternoon

Carlos Alcaraz has reached his 10th career Grand Slam quarterfinal, tied for the most by a man before his 22nd birthday, by advancing at the Australian Open when 15th-seeded Jack Draper stopped playin

There are three American men aged 23 and under in the second week of a Grand Slam. That hasn't happened since 2003

Two friends from California, Learner Tien and Alex Michelsen, have both reached the fourth round at the Australian Open

Two of four American men still playing in Melbourne, Irvine native Tien, 19, and Aliso Viejo native Michelsen, 20, became friends on the youth tennis circuit

Danielle Collins has long been one of women's tennis' most fiery competitors. But after her tight second-round Australian Open win over Australian underdog Destanee Aiava, Collins showed she can bring it with the crowd,

American tennis player Danielle Collins embraced the Australian Open boos after her latest win. But there's more to her heel turn than meets the eye.