Chile midfielder Arturo Vidal will be given until the last minute to prove his fitness for his team's clash against Australia.
Vidal underwent minor knee surgery at the start of May and is expected to miss Chile's FIFA World Cup opener on Friday.
But the Juventus man's importance in midfield means coach Jorge Sampaoli is willing to wait for the 27-year-old.
"We will decide in the coming hours whether Arturo Vidal will play or not," Sampaoli told a news conference on Thursday.
"He has had a difficult preparation with an injury but after working with the physio, he has a chance now to play because of his character and courage.
"Otherwise he would not have come with the squad with that kind of injury. So, I hope he will be fit to play tomorrow."
After their clash against Australia, Chile face giants Spain and the Netherlands in a tough Group B.
Sampaoli said he believes his team's recent form suggests they can be competitive against the 2010 World Cup finalists.
"To be honest we have a difficult group," he said.
"We are going face teams with a lot history, but we are working to be tough opponents for them.
"I guess if we play as well as we have in the last games, we can compete with Spain and the Netherlands."
|Coach: J. Sampaoli|
for A. Vidal 60'
for J. Valdivia 68'
for E. Vargas 88'
|Del Bosque unmoved by calls for two strikers|
|Deschamps praise for beautiful France|
|Fekir ruptures knee ligaments|
|Italy v Bulgaria: Conte warns against complacency|
|Euro 2016 Qualifiers Review: Germany top Group D, Northern Ireland edge closer|
|Low: Three points most important|
|Northern Ireland on the verge of a ´magnificent achievement´ - O´Neill|
|Scotland need something against Germany - Strachan|
|Portugal 0 France 1: Late Valbuena set-piece clinches deserved win|
|Faroe Islands 1 Northern Ireland 3: O´Neill´s men edge closer|
|Germany 3 Poland 1: Gotze sends world champions top|
|Gibraltar 0 Republic of Ireland 4: Irish hopes reignited|
|Djibouti 0 Togo 2: Saintfiet´s side make it two wins from two|
|Cyprus v Belgium: Benteke boost for Wilmots´ men|
|Roma youngster faces lengthy lay-off|
|United hit back at Perez barb over De Gea saga|
|Georgia 1 Scotland 0: Strachan´s men succumb to Tbilisi hoodoo|
|Hodgson prepared to blood new players|
|Porto invite Euro elite to help raise millions for migrants|
|Dortmund legend Dede backs Tuchel to succeed|
|Robben out for four weeks|
|Turkey v Netherlands: Terim expecting hostile atmosphere for crunch clash|
|Portugal 0-1 France: Valbuena strikes late to sink Ronaldo & Co|
|Wales v Israel: Euro 2016 beckons for Coleman´s history boys|
|Gala: No extra payment for Grosskreutz|
|Increase Bundesliga´s TV rights or be left behind - Rummenigge|
|Kane: I´m no flash in the pan|
|Perez: United showed inexperience in De Gea saga|
|Milligan: Socceroos wary of Tajikistan|
|Conte wants more players like Pelle|
|OFC World Cup Qualifying Review: Samoa to meet Tahiti in next round|
|Krychowiak stayed at Sevilla because of Emery|
|I never considered Bayern exit - Gotze|
|Balotelli ´not in good condition´, Milan must improve - Mihajlovic|
|Robben slams ´stupid´ Martins Indi|
|Robben laments injury blow|
|Euro 2016 Qualifiers Review: Bale edges Wales closer, Iceland dent Netherlands´ qualification hopes|
|De Bruyne relieved to ´boss´ Bosnia-Herzegovina|
|Blind furious after nightmare debut|
|Coleman sees shades of Charles in Bale winner|
|Conte only concerned about Italy winning|
|Mauritania v South Africa: SAFA to investigate Masilela no-show|
|AFC World Cup Qualifying Review: Qatar hit 15 in Bhutan rout|
|Belgium 3 Bosnia-Herzegovina 1: De Bruyne shines in straightforward victory|
|Cyprus 0 Wales 1: Bale winner takes Wales one step closer|
|Netherlands 0 Iceland 1: Sigurdsson winner caps difficult first game for Blind|
|Italy 1 Malta 0: Pelle spares wasteful Azzurri|
|Balotelli stars in Milan friendly win|
|Bhutan thrashed 15-0 by Qatar in qualifier|
|Rwanda v Ghana: Gyan doubt gives hosts hope|
|Tanzania v Nigeria: Enyeama out of AFCON qualifier|
|Valdes and Berahino included in Premier League squads|
|Costa Rica v Brazil: Dunga´s men return after Copa disappointment|
|Spain v Slovakia: Azpilicueta eyeing important revenge|
|Adebayor left out of Tottenham squad list for league and Europe|
|San Marino v England: Place in history books beckons for Rooney|
|Germany can cope with Reus absence - Low|
|Bayern offer aid to refugees in ´training camp´|
|BREAKING NEWS: Welbeck ruled out for months after knee surgery|
|South Korea 8 Laos 0: Son leads the way in rout|
|Australia 5 Bangladesh 0: Socceroos surge to emphatic win|
|Japan 3 Cambodia 0: Hosts pick up first qualifying win|
|Rudiger aiming to nail down Euros spot after Roma move|
|Melo happy to join Inter at last|
|Hernandez thanks Ferguson after United departure|
|Chung: AFC has compromised FIFA election|
|Wales the new best of British|
|Reus out of Germany qualifiers|
|Chile v Paraguay: Vidal missing for Copa champions|
|Ghedin: Anything is possible for Malta|
|Pogba will be worth €100m - Marotta|
|England can win Euro 2016 - Hodgson tells players|
|Conte unsure over Balotelli future|
|Argentina - Bolivia Preview: Mascherano backs 'very special' Messi|
|Portugal - France Preview: Deschamps aiming to correct mistakes|