Daniil Medvedev fired Russia to victory in the $7.5 million ATP Cup with a dominant performance against Italy in Melbourne on Sunday.
Nadal was the favourite and top seed having lifted the Barcelona Open trophy last month but played below par on a sweltering spring day.
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.
Nadal plays Berrettini in one semifinal, knowing he's potentially two match wins from a 21st major title.
A summary of Friday's action in the Davis Cup group stage matches.
Novak Djokovic believes he is the best player in the modern era
Russian Andrey Rublev has become the fifth singles player to qualify for the season-ending ATP Finals in Turin next month, the men's tour said.
Greek third seed Stefanos Tsitsipas battled back from a set down to beat Serbia's Filip Krajinovic 3-6, 6-4, 6-4 in the quarter-finals of the Swiss Indoor championship on Friday. The win took Tsitsipas into his 10th semi-final of the season where he will face top seed Roger Federer, who was handed a walkover after Swiss compatriot Stan Wawrinka withdrew before their quarter-final with a back issue.
Jannik Sinner defeated Carlos Alcaraz in a high-octane final to claim his maiden Wimbledon trophy and fourth Grand Slam crown on Sunday.
Images from Day 2 of the 2023 Australian Open at Melbourne Park on Tuesday.
Zheng Qinwen saw off a spirited challenge from Diana Shnaider to secure a hard-fought 7-6(5), 6-3 win in their Pan Pacific Open semi-final on Saturday and set up a title clash against American Sofia Kenin.
World No 1 Djokovic on Sunday won his sixth Wimbledon title. With this win, Djokovic now has 20 Grand Slams to his name and he is now equal with Swiss tennis maestro Roger Federer and Nadal.
Six-times winners Spain will meet Croatia for a place in the semi-finals.
Only once in 16 previous appearances has Federer not survived the group stage, back in 2008. IMAGES from the ATP Finals played at The O2 Arena in London on Sunday
Casper Ruud has become the first Norwegian to book a place in the season-ending ATP Finals, leaving one spot to be filled at the tournament in Turin, Italy later this month.
Second seed Daniil Medvedev will launch his bid to win his first major title against veteran Frenchman Richard Gasquet.
Novak Djokovic will begin his quest for a record-extending 10th Australian Open title against Roberto Carballes Baena.
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.
Factbox on Carlos Alcaraz, who beat seven-time champion Novak Djokovic
Wild card Caroline Wozniacki, another former champion and returning mother, will play 20th seed Magda Linette.
Andy Murray said he remains on course to play at Wimbledon even though he is still being hampered by an abdominal injury
Italy sealed a place in the semi-finals of the ATP Cup by winning both singles matches against France
World number one Rafael Nadal has been drawn alongside defending champion Alexander Zverev, Association of Tennis Professionals (ATP) reported.
Famous faces spotted at the finals:
The unpredictable nature of the 2024 US Open has turned it into one of the most thrilling Grand Slam tournaments in recent memory.
A summary of Tuesday's action at the US Open.
Rafael Nadal will become the first man to win 21 Grand Slam titles if he defeats the Russian in Melbourne.
Federer decided to end his Roland Garros campaign on Sunday, a day after winning a gruelling third-round match against Dominik Koepfer.
Novak Djokovic's ability to play his best tennis under pressure can help him win at least five more Grand Slam titles, John McEnroe said after the World No.1 tied Roger Federer and Rafael Nadal's record with his 20th major at Wimbledon on Sunday.
Nadal will not be playing at Wimbledon, having decided to rest, while eight-time champion Federer is showing signs that, at 39, the window of opportunity to win one more Slam is closing.
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.
Andrea Binaghi, who has headed the Italian tennis federation (FITP) since 2001, pointed to reforms over the last 10-15 years to decentralise the coaching system and offer more financial, technical and psychological support to young talent.
Frances Tiafoe sealed Team World's first victory over Team Europe in the Laver Cup as he saved four match points on the way to beating Stefanos Tsitsipas on Sunday.
India's number one player Prajnesh Gunneswaran, who achieved career-high 102 ranking this week, has been drawn against 22-year-old debutant Matteo Berrettini in the second singles rubber at the Calcutta South Club grass courts.
Grigor Dimitrov is the latest player to be hit by injury in Melbourne
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 has won the last three editions of Wimbledon in 2018, 2019 and last year
Sinner is most likely to upset the applecart after the Italian's run to the Canadian Open title this month
Djokovic had been favourite to win a 10th title at Melbourne Park and claim a 21st Grand Slam crown but the Serb now faces being deported from Australia.