Australian Open Day 3: Medvedev, Boulter Through; Rublev Knocked Out

Madison Keys, left, of the U.S. is congratulated by compatriot Ann Li following their first round match at the Australian Open tennis championship in Melbourne, Australia.

Emma Raducanu of Britain celebrates after defeating Ekaterina Alexandrova of Russia in their first round match at the Australian Open tennis championship in Melbourne, Australia.

Matteo Berrettini of Italy reacts after winning a point against Cameron Norrie of Britain during their first round match at the Australian Open tennis championship in Melbourne, Australia.

Taylor Fritz of the U.S. plays a forehand return to Jenson Brooksby of the U.S. during their first round match at the Australian Open tennis championship in Melbourne, Australia.

Jenson Brooksby of the U.S. serves to Taylor Fritz of the U.S. during their first round match at the Australian Open tennis championship in Melbourne, Australia.

Cameron Norrie of Britain plays a backhand return to Matteo Berrettini of Italy during their first round match at the Australian Open tennis championship in Melbourne, Australia.

Zhang Zhizhen of China plays a backhand return to Holger Rune of Denmark during their first round match at the Australian Open tennis championship in Melbourne, Australia.

Camilo Ugo Carabelli of Argentina plays a backhand return to Learner Tien of the U.S. during their first round match at the Australian Open tennis championship in Melbourne, Australia.

Learner Tien of the U.S. plays a forehand return to Camilo Ugo Carabelli of Argentina during their first round match at the Australian Open tennis championship in Melbourne, Australia.

Peyton Stearns of the U.S. plays a forehand return to Emma Navarro of the U.S. during their first round match at the Australian Open tennis championship in Melbourne, Australia.

Emma Navarro of the U.S. plays a forehand return to Peyton Stearns of the U.S. during their first round match at the Australian Open tennis championship in Melbourne, Australia.

Emma Raducanu of Britain plays a backhand return to Ekaterina Alexandrova of Russia during their first round match at the Australian Open tennis championship in Melbourne, Australia.

Daniil Medvedev of Russia plays a forehand return to Kasidit Samrej of Thailand during their first round match at the Australian Open tennis championship in Melbourne, Australia.

Gael Monfils of France celebrates after defeating compatriot Giovanni Mpetshi Perricard in their first round match at the Australian Open tennis championship in Melbourne, Australia.

Madison Keys of the U.S. plays a forehand return to compatriot Ann Li during their first round match at the Australian Open tennis championship in Melbourne, Australia.

Lorenzo Musetti of Italy serves to compatriot Matteo Arnaldi during their first round match at the Australian Open tennis championship in Melbourne, Australia.

Zhang Shuai of China reacts after defeating McCartney Kessler of the U.S. during their first round match at the Australian Open tennis championship in Melbourne, Australia.

Hubert Hurkacz of Poland plays a backhand return to Tallon Griekspoor of the Netherlands during their first round match at the Australian Open tennis championship in Melbourne, Australia.

Iva Jovic of the U.S. plays a backhand return to Nuria Parrizas Diaz of Spain during their first round match at the Australian Open tennis championship in Melbourne, Australia.

Gael Monfils of France plays a forehand return to Giovanni Mpetshi Perricard of France during their first round match at the Australian Open tennis championship in Melbourne, Australia.

Joao Fonseca of Brazil is congratulated by Andrey Rublev, right, of Russia following their first round match at the Australian Open tennis championship in Melbourne, Australia.

Joao Fonseca of Brazil takes a selfie with fans after defeating Andrey Rublev of Russia in their first round match at the Australian Open tennis championship in Melbourne, Australia.