Novak Djokovic's bid for a record 25th Grand Slam title kicked off on Monday with an easy win over qualifier Radu Albot in the US Open first round.
Six-times winners Spain will meet Croatia for a place in the semi-finals.
'Rafael Nadal withdrew for personal reasons'
Wild card Caroline Wozniacki, another former champion and returning mother, will play 20th seed Magda Linette.
Shapovalov will meet Rafael Nadal for a place in the semi-finals.
Images from Day 2 of the 2023 Australian Open at Melbourne Park on Tuesday.
A couple of months ago, the 35-year-old Spaniard was worried that he might never return to the court again.
Canada booked a showdown with Australia in the Davis Cup final after Felix Auger-Aliassime and Vasek Pospisil edged out Italians Matteo Berrettini and Fabio Fognini 7-6(2), 7-5 in a tightly fought decisive doubles affair on Saturday.
Nadal plays Berrettini in one semifinal, knowing he's potentially two match wins from a 21st major title.
Roger Federer on Sunday congratulated Serbia's Novak Djokovic on joining the 20 Club.
Giovanni Bartocci stood outside Billie Jean King National Tennis Center on Saturday shouting encouragement - and eventually employing a microphone and loudspeaker - as the Italian dismantled opponent Casper Ruud in straight sets on Court 17.
Former world number one Andy Murray looked back to his best on grass as he beat Nick Kyrgios 7-6(5), 6-2 to move into the final of the Stuttgart Open on Saturday after the Australian lost his cool in the second set and said he was racially abused by a fan.
Factbox on Carlos Alcaraz, who beat seven-time champion Novak Djokovic
Daniil Medvedev will play Rafael Nadal for the Australian Open title on Sunday after a stirring victory over Greek fourth seed Stefanos Tsitsipas in the semi-final on Friday.
The United States justified their status as favourites to outclass Italy in a one-sided final at the inaugural United Cup mixed team tournament on Sunday.
A summary of Tuesday's action at the US Open.
Rafael Nadal toppled big-serving American Reilly Opelka to remain perfect on the year while unseeded Serbian Miomir Kecmanovic stunned world number six Matteo Berrettini.
Simona Halep ended Beatriz Haddad Maia's dream run in Toronto
Nadal has won the Australian and the French Open back-to-back and has the chance to become the first man to win all four majors in the same year
Britain battled to victory over last year's Davis Cup runners-up Australia in their Finals group stage opener on Wednesday, while Spain and Italy both suffered chastening defeats at home in the premier men's team competition.
Djokovic found a little girl who had held up a sign and ran over to give her a racket, then blew kisses at her.
Sinner is most likely to upset the applecart after the Italian's run to the Canadian Open title this month
Daniil Medvedev fired Russia to victory in the $7.5 million ATP Cup with a dominant performance against Italy in Melbourne on Sunday.
A round-up of all tennis action on Saturday.
18-year-old Carlos Alcaraz of Spain became the youngest to clinch an ATP 500 title at the same event on Sunday when he defeated Diego Schwartzman in the final of the Rio Open.
A summary of Friday's action at the US Open.
Galan will play either Canadian Denis Shapovalov or American Brandon Nakashima for a place in the fourth round.
Novak Djokovic will begin his quest for a record-extending 10th Australian Open title against Roberto Carballes Baena.
Sinner has made the most of a favourable draw at the grasscourt major this year
Djokovic has won the last three editions of Wimbledon in 2018, 2019 and last year
A summary of Sunday's action at the US Open.
Medvedev whips Dimitrov to enter US Open final
No Italian man has won a Grand Slam since Adriano Panatta triumphed at Roland Garros in 1976 and if there is any chance that Sinner, Musetti or Berrettini will lift the Musketeers Cup this year, they will face their biggest obstacles in the next round when they take on the might of Nadal, Djokovic and Federer respectively.
'There is so much excitement brewing about Wednesday's Alcaraz and Rune quarter-finals showdown -- it could well be a juicy foretaste of things to come.'
Reactions to Novak Djokovic winning his 20th Grand Slam singles title at Wimbledon
Novak Djokovic kicked off his season in style with a 7-5, 7-5 win over Canadian talent Denis Shapovalov on his favourite Rod Laver Arena court on Tuesday before returning to lead Serbia to a doubles victory that sealed their ATP Cup opener 2-1.
Novak Djokovic produced a stunning performance to thrash Frances Tiafoe in his first match since winning Wimbledon in July to edge Team Europe ahead in the Laver Cup on Saturday.
Muguruza wins all-Spanish clash with Badosa at WTA Finals
Monfils, 35, reached the last four at the 2008 French Open and repeated the feat eight years later at the 2016 US Open but has never reached a Grand Slam final.
Famous faces spotted at the finals:
