Lionel Messi is in a "good moment" physically and excited for the challenge of trying to help Argentina win the World Cup, according to Jorge Sampaoli.
La Albiceleste are set to face Iceland, Croatia and Nigeria in Group D at the finals in Russia, as they seek to go one better than their loss to Germany in the final in 2014.
Messi was said to have arrived at the previous tournament in Brazil short of full fitness after a difficult season under Gerardo Martino at Barcelona.
But the superstar forward has been in sparkling form as the Blaugrana won LaLiga this term, leaving Sampaoli optimistic upon naming his final 23-man squad on Monday.
"I've talked to Messi and I [found] him very excited about what's coming, physically he's in a good moment," the coach told a news conference.
Messi's fellow forward Sergio Aguero has not played for his club Manchester City since April due to a knee injury, but Sampaoli declared the 29-year-old fully fit.
"He is working normally since last week," the coach said.
"[Gabriel] Mercado is not going to have any kind of [major problems]. We'll see how [Lucas] Biglia arrives [in camp]."
Jorge Sampaoli: "Hay jugadores jóvenes y con mucho potencial. Será importante lo que trasladen los jugadores con experiencia". pic.twitter.com/mjhaUzrE3j— Selección Argentina (@Argentina) May 21, 2018
Argentina struggled in qualifying, and needed a Messi hat-trick in their final match away to Ecuador to secure passage to Russia.
Sampaoli, though, is confident the team can impress at the tournament, and is planning to pick the players who are able to cope with the pressure of carrying the hopes of a nation on the big stage.
"The World Cup has to be faced without fear, with loftiness, with presence, and those who are more convinced of their game will be closer to the starting line-up," he said.
"One understands that these players have characteristics that serve us ... with time and the desire to play, this will be enhanced, I have great hope and, every time I see them train, the dream grows.
"For me, the objective is to enhance individual characteristics to make a great World Cup.
"If we dare to play, we will be a complex opponent for anyone.
"We are obliged to move an entire country, I hope we can do it the way we want."
|Barca boss Valverde calls for clarity on RFEF rules|
|Bears rack up 107 points in routing Enisei en route to quarter-finals|
|Paris Saint-Germain 9 Guingamp 0: Verratti injured for rampant champions|
|Solskjaer: I´ll remember managing United for the rest of my life|
|Palace win a ´massive relief´ for Liverpool boss Klopp|
|Salah fourth fasted to 50 goals in Premier League history|
|Real Madrid 2 Sevilla 0: Solari´s side take over third spot|
|Watford 0 Burnley 0: Wood denied winner by contentious call|
|Liverpool 4 Crystal Palace 3: Salah reaches 50 thanks to Speroni shocker|
|Newcastle United 3 Cardiff City 0: Schar double moves hosts out of bottom three|
|Southampton 2 Everton 1: In-form Saints steer clear of trouble|
|Bournemouth 2 West Ham 0: Wilson and King sink Pellegrini´s men|
|Manchester United 2 Brighton and Hove Albion 1: Record-breaking win for Solskjaer|
|Pelicans star Anthony Davis out for one to two weeks with sprained finger|
|Verratti hobbles off for PSG against Guingamp|
|Brook ponders next move after missing out on Khan|
|Mick Schumacher: The Ferrari academy graduates who made it to F1|
|Thailand v China: Lippi aims to overcome War Elephants and reach last eight|
|I deserved red card, says Wolves boss Nuno|
|Mick Schumacher joins Ferrari Driver Academy|
|Jared Goff not worried about Superdome noise: ´When it´s loud, we love it´|
|Rooney urged Rashford to run at defenders|
|Former Springbok Lambie retires from rugby aged 28|
|Spygate: EFL confirms 11 clubs have made contact about Leeds|
|When it´s loud, we love it - Goff ready for New Orleans noise|
|Wolves 4 Leicester City 3: Jota hat-trick drama piles pressure on Puel|
|´Asparagus´ Zverev joins frustrated Djokovic in round four|
|Lowry takes Abu Dhabi title at the last after ding-dong Sterne battle|
|Rooney: United should go "all out" for Pochettino|
|Djokovic frustrated by ´unnecessary´ Australian Open floodlights|
|Jordan v Vietnam: Park expecting ´aggressive´ encounter|
|Serena and Halep book blockbuster, Osaka won´t throw in the towel|
|Brady: Mahomes has had ´spectacular season´|
|Halep not intimidated by Serena anymore|
|Farrell´s Six Nations preparations hit by thumb injury|
|Pogba confident Manchester United can reach top four|
|Alexander-Arnold embodies Liverpool spirit - Klopp|
|Stoinis shoots Stars to Melbourne derby victory|
|A-League Review: Glory held in stalemate as Sydney close the gap|
|DeMarcus Cousins ´felt like a kid on Christmas´ in Warriors debut|
|Alexander-Arnold signs long-term contract at Liverpool|
|Pochettino eyes Messi-esque role for Alli|
|Halep sets up mouth-watering Serena showdown by conquering Venus|
|Wilder-Fury II expected for April 27 or May - Warren|
|Celtics´ Kyrie Irving on technical: If someone questions your manhood, you got no choice|
|Serena would ´love´ Halep clash|
|Djokovic sees off Shapovalov at Aus Open|
|DeMarcus Cousins scores 14 points in Warriors debut|
|´Don´t cry, you did really well´ - Serena consoles Yastremska|
|Andrade eyes Golovkin after defending middleweight title|
|WATCH: Cousins throws down thunderous dunk to open Warriors career|
|Serena sails into Australian Open last 16|
|Icardi will renew Inter contract - Nara|
|Mickelson maintains Desert Classic lead|
|Klopp dismisses Coutinho rumours|
|Osaka completes stunning comeback in Melbourne|
|Lakers guard Rondo cleared for full-contact practices|
|Solskjaer: Lukaku is big part of Man United squad|
|Napoli slam FIGC decision to reject Koulibaly appeal|
|We´re the hunters! - Kovac´s Bayern ready to chase down Dortmund|
|Chiefs safety Reid expected to play against Patriots|
|Chelsea not ready to rest Jorginho - Sarri|
|NFL receiver Fitzgerald has hole-in-one in round of golf with former president Obama|
|I´m really loving playing this game - Eagles QB Foles not ready to retire|
|Saints show no mercy, score 111 in rout of Timisoara Saracens|
|CAF Champions League Review: Khenissi double gets ES Tunis up and running|
|Edinburgh clinch home quarter-final, Glasgow also advance to last eight|
|Hazlewood to miss Sri Lanka Tests with back injury|
|Norwich City 3 Birmingham City 1: Canaries end winless run to go second|
|Hoffenheim 1 Bayern Munich 3: Goretzka goals close gap on Bundesliga´s return|