Poland coach Adam Nawalka is hopeful defender Kamil Glik will return to the pitch against Colombia on Sunday.
Having lost their World Cup opener to Senegal 2-1, Poland's clash with the South Americans takes on extra importance, particularly given Jose Pekerman's side began their tournament with a defeat to Japan by the same scoreline.
Glik missed their first game due a shoulder injury, which he sustained in a game of football-volleyball in training at the start of June.
The news dealt them a significant blow as it robbed them of their best defender and, while it was not confirmed that he will return in Kazan, Nawalka says the 30-year-old's has recovered "in a commanding way".
"Kamil is training," Nawalka told reporters in his pre-match news conference.
"He has been training all the time, making up for the time he lost due to injury. When it comes to tactics and the line-up, I am thinking about the basic squad tomorrow, but a decision will be made after training [on Saturday].
"I'm very happy Glik is returning to his excellent form and that he is very strongly determined to return to the pitch.
"This is a rare example of a player, who, after such a serious injury, is so strongly motivated.
"He has recuperated in commanding way. We want him back, but he also needs time. Whether that time has come or not, I will decide later after training."
James Rodriguez started Colombia's defeat to Japan on the bench having been suffering from an injury of his own, but he is expected to be back in the line-up on Sunday.
And Poland midfielder Piotr Zielinski is under no illusion as to how big an impact James' return could have on Colombia, for whom he is a "driving force".
"We know what James can do," Zielinski said. "He has played for many levels at a top level, so I believe the Colombia team appreciates that.
"He is the locomotive of the Colombian team, their driving force. He can be very dangerous and we must be prepared to counter him, but there will be others we also have to work out [how to stop]."
|Ibrahimovic to watch England at Wembley – Zlatan will honour Beckham bet|
|Cubs use five-run fifth inning to trump Cardinals|
|Manchester United 1 America 1: Mata salvages draw for Red Devils|
|Steelers´ Super Bowl window getting smaller - Brown|
|Neymar cares about PSG and will stay amid Real Madrid speculation|
|NFL, NFLPA at ´standstill agreement´ over anthem policy|
|Guardiola: It would´ve been a mistake for Jorginho to join City|
|Angels star Ohtani cleared to resume pitching|
|´I don´t give a f***´ – Cousins hits back at critics after Warriors move|
|Merritt leads Barbasol Championship|
|Ruud awakening for Ferrer in Bastad|
|Nibali withdraws from Tour de France with back fracture|
|Fabinho: I´ll try to convince Mbappe to join Liverpool|
|Beating Messi boosted France´s World Cup belief – Lloris|
|Carnoustie saving the worst until last|
|McIlroy´s youthful exuberance could be a bad sign for Carnoustie contenders|
|Saints triumph at second-placed Wigan|
|Anfield atmosphere sweetened Alisson on Liverpool|
|Bouchard reaches Gstaad quarter-finals|
|´What are you waiting for?´ - Alisson reveals Salah text messages|
|´Full package´ Alisson could not be missed - Klopp|
|Alisson to Liverpool: Brazil star becomes most expensive goalkeeper in history|
|Alisson to Liverpool: Brazilian´s stats blitz Mignolet, Karius|
|Liverpool sign Alisson in world-record deal|
|The Open 2018 diary: Spieth´s got ball skills as Finau proves the scratch golfer|
|Woods: Score doesn´t reflect how well I played|
|Can we go to Paris now? - Thomas in a hurry after conquering Alpe d´Huez|
|Thomas: I could have finished stronger|
|Kisner shines at baked Carnoustie as McIlroy, Rahm and Thomas loom|
|Sarri´s mentality made me a better footballer - Jorginho|
|Tax rates played a role in Ronaldo joining Juventus, says LaLiga president|
|Aggressive McIlroy doing it his way, not the fairway|
|I let him have it - Spinazzola ribs Ronaldo over Juve shirt number|
|Thomas makes it back-to-back wins|
|Ramos may remain for Spain but Luis Enrique promising surprises|
|Cazorla still playing through pain after Villarreal appearance|
|Vegas to Carnoustie - a hellish trip for Jhonattan|
|NFL training camp 2018: Five under-the-radar rookies to watch|
|Woods off to a flyer as Thomas charges|
|Sanchez given green light to join Man Utd tour|
|Greipel, Groenewegen and Gaviria latest sprinters to abandon Tour de France|
|Luis Enrique hopeful over Pique as he plots a Spanish evolution|
|I had a brain fart - Spieth disappointed with missed opportunity|
|I´ve sacrificed too much to quit, says injury-plagued Rossi|
|Klopp rejects Henderson´s plea to return early to Liverpool training|
|Open champion Spieth loses ground in scrappy finish|
|Alexis Sanchez hints visa issue sorted as United States trip beckons|
|Kovac an admirer of Pavard, expects James to stay|
|Dzeko happy at Roma and eyeing silverware|
|Eels win basement battle with Bulldogs|
|Kluivert to follow Totti´s example after taking ´big step´ with Roma|
|Kisner hopes to return Claret Jug favour to Spieth|
|FIBA bans 13 players & two coaches over Philippines-Australia brawl|
|Spieth and Rahm in the mix as Kisner sets the target|
|Monchi insists Roma remain ambitious as Liverpool close in on Alisson|
|Cavendish thanks ´race that shaped career & heart´ after cruel Tour exit|
|No Trent Bridge Ashes Test as England confirm schedule|
|Ajax tell Barcelona not even ´insane´ money will buy De Ligt, De Jong|
|Hamilton agrees two-year Mercedes extension|
|Uran withdraws from Tour after failing to shake off injuries|
|Spieth tees off Open defence|
|Zidane has shown no will to coach France, insists FFF president|
|Risking the curse - Steelers star Brown lands on Madden 19 cover|
|Pogba silenced his critics with World Cup displays – Ibrahimovic|
|Warburton overwhelmed by support following retirement|
|Wilshere excited by tactics of Wenger-like Pellegrini|
|Deschamps never considered France exit prior to World Cup win|
|Persepolis eye Champions League after Iran impress at World Cup|
|Sandy Lyle gets The Open underway at Carnoustie|
|Roosters sign England international Hall|