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]."
|Werner would welcome Ozil Germany return|
|´Perfectionist´ Serena admits to ´unrealistic´ expectations in tennis and motherhood|
|Klopp praises Deschamps and his ´boring´ France|
|LaLiga 2018-19: Bale or Griezmann - Who will step into Ronaldo´s breach as Messi´s main rival?|
|Woods winning 15th major would be greatest comeback in sport – Faldo|
|Retiring Storm great Hoffman not giving up on Finals dream|
|Folau won´t change aerial approach in All Blacks showdown|
|Racism behind Sterling criticism, says ex-Arsenal star Wright|
|Eto´o joins Qatar SC following Ligue 1 links|
|UEFA Super Cup 2018-19: Atletico academy eclipsing Madrid, La Masia|
|UEFA Super Cup 2018-19: Should Real Madrid cash in on Modric?|
|Scintillating Serena sends warning, Azarenka survives opener|
|DeGrom strikes out 12, Mets hit 5 homers in win over Yankees|
|Djokovic needs nine MPs as Murray crashes out|
|Murray unsure of US Open readiness after Cincinnati exit|
|Van Dijk: Alisson making difference at Liverpool|
|Johnson saves eight MPs but Djokovic prevails|
|Federer anxious ahead of Cincinnati comeback|
|Tevez relishing Messi reunion|
|Ronaldo arrival has taken Juve forward in Europe – Nedved|
|Serena steamrolls Gavrilova in Cincinnati return|
|Packers QB Rodgers doesn´t regret criticising team-mates|
|Indians OF Martin recovering from life-threatening bacterial infection|
|Shoulder injury sends Royals starter Duffy to DL|
|Yankees place Sabathia on DL with right knee inflammation|
|Aubameyang urges Emery to capitalise on his ´spark´ with Lacazette|
|Anderson can play until he´s 40, says Bayliss|
|Keita living childhood dream after securing Inter switch|
|49ers to sign veteran RB Alfred Morris, Kyle Shanahan says|
|Arnaiz leaves Barcelona for Leganes in €5m deal|
|Tottenham´s move to new stadium delayed|
|Roosters-bound Hall suffers ACL injury|
|Murray suffers Cincinnati defeat to Pouille|
|No Cech mate - Arsenal goalkeeper hits back at Bayer Leverkusen|
|Halep first to seal WTA Finals spot|
|Veteran Carmelo Anthony pens one-year Rockets deal|
|Runners and Ryders: Poulter closes in on Team Europe spot|
|Gameiro presented by Valencia after departing Atletico Madrid|
|World Cup winner Kimpembe extends PSG contract to 2023|
|AC Milan send Locatelli on loan to Sassuolo|
|South Africa´s Etzebeth set for return from injury|
|Rafinha ´very likely´ to stay at Barcelona|
|No dual Ryder Cup role should Woods make USA team, says Furyk|
|Inter complete Keita deal|
|David Silva announces retirement from international football|
|Modric in Real Madrid´s UEFA Super Cup squad amid Inter links|
|Neville hopes Shaw is on to something special after first United goal|
|Unchanged England waiting on Stokes verdict|
|Yates brothers to race Vuelta together|
|Kalinic explains why he rejected World Cup medal|
|Furyk excited to see Woods´ return to form|
|Liverpool ignoring media´s champions chat, says Van Dijk|
|Suspended Smith replaces Kohli as top-ranked Test batsman|
|Tiger fanfare inevitable but it´s time to recognise Koepka as the star he is|
|Dier: Tottenham will shut up transfer critics|
|Fernandes leaves West Ham for Fiorentina on loan|
|´No chance´ Willian would have stayed at Chelsea under Conte|
|Vettel confident he can catch Hamilton|
|Cane dismisses talk of All Blacks limiting haka|
|Zaha promises Palace commitment as contract talks continue|
|Real Madrid defender Odriozola to miss UEFA Super Cup|
|All Blacks wary of Pocock threat|
|Bayern Munich confirm no ligament damage for Alaba|
|Nicklaus hails Koepka´s great year after US PGA triumph|
|Keita ready to ´explode´ at Inter|
|Halep: Stephens makes me a better player|
|Manchester United loan Wilson to Aberdeen|
|Beale backs Hodge to start in Rugby Championship opener|
|Bakayoko arrives for AC Milan medical|
|Australia favourites for Rugby Championship opener, says Hansen|