Aussie Open quarterfinals preview: Serena-Sharapova rivalry resumes

On Tuesday at the Australian Open, Serena Williams will take on Maria Sharapova for the 21st time and Djokovic, Federer and Radwanska are also in action.

Here are the matches to watch on Tuesday on Day 9 of the 2016 Australian Open in Melbourne as the first round of quarterfinals matches get underway. Play begins on all courts at 7 p.m. ET. Click here for the full order of play, and see the full TV schedule here.

Agnieszka Radwanska vs. Carla Suarez Navarro
(first match at 7 p.m. ET, Rod Laver)

Fourth-seeded Agnieszka Radwanksa is into the quarterfinals in Melbourne for the fifth time in six years after a three-set win over German Anna-Lena Friedsam, who suffered cramping and was visibly upset during the last two games of the match.

Radwanska’s quest for her first Grand Slam title will have to go through No. 10-seed Carla Suarez Navarro, who knocked out Australian Daria Gavrilova on Sunday.

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“I think the biggest thing is he doesn't miss, you know. He doesn't give you easy points, any free points. I have to, you know, be the one to dictate. I think he's serving well, too. It always makes tough player.”