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]."
|Klopp calls for electric Anfield atmosphere against Napoli|
|Saints clinch back-to-back NFC South titles, Bears trump Rams|
|Bucks improve to 2-0 against Raptors with win in Toronto|
|Black Caps include Patel for Sri Lanka Tests|
|Maidana: River want Real Madrid clash|
|Cowboys top Eagles in OT behind stellar Cooper display|
|AC Milan evaluating Fabregas signing – Leonardo|
|WATCH: Steelers´ chance at game-tying field goal slips away|
|Hayne will plead not guilty to charges, says lawyer|
|Boca boss Schelotto: The only thing I feel is sadness|
|Cardinals´ Fitzgerald makes NFL history with most receptions for one team|
|River Plate´s Copa Libertadores star Gonzalo Martinez confirms January departure|
|Klopp: I was never worried about Salah´s form|
|Packers QB Rodgers sets NFL record for most passes without an interception|
|World Cup bulking hampered Man United form – Lukaku|
|Leonardo rules out Ibrahimovic Milan return|
|Warriors´ Green to return against Timberwolves|
|I feel for him… we´ll make it work – Butler responds to Embiid´s frustration|
|Torino draw no missed opportunity for misfiring AC Milan, claims Gattuso|
|We´ll always be linked together forever - Wade reflects on playing with James before final match-up|
|O´Sullivan wins record seventh UK title|
|Chiefs secure playoff berth, Saints win NFC South|
|River Plate 3 Boca Juniors 1 (aet, 5-3 agg): Quintero and Martinez clinch Libertadores title in extr|
|WATCH: Chiefs QB Mahomes throws no-look pass|
|Dolphins defeat Patriots on miraculous final play|
|Kizzire eagle snatches QBE Shootout victory|
|AC Milan 0 Torino 0: Donnarumma shines, Cutrone misses late chance|
|Back to the drawing board for West Indies - Chase|
|Copa Libertadores: Messi and Griezmann among stars in Madrid for River-Boca Superclasico|
|Brady sets NFL record for most career TD passes|
|Copa Libertadores: Tevez named on Boca bench for Superclasico final|
|Premier League needs VAR, right now! - Benitez fumes over Dean´s decisions|
|McCall expects Itoje to fit for the Six Nations|
|Solari salutes Real Madrid character after ´ugly´ Huesca win|
|Berbatov defends under-fire Lukaku|
|Sarries crush Blues to maintain unbeaten start|
|Newcastle United 1 Wolves 2: Doherty punishes Yedlin red with late winner|
|Deeney jokes he´ll ´smash´ former Watford star Richarlison|
|Huesca 0 Real Madrid 1: Bale ends drought as Solari´s men edge to victory|
|Ponting: Umpires not looking at no-balls|
|Bale ends longest LaLiga goal drought|
|Porter backs Brees for MVP, Saints for Super Bowl|
|Verstappen eyeing 2019 title fight|
|Wall ´shouldn´t have played´ against Cavaliers after scoring just one point|
|Hazard: Man City the best team in the Premier League despite Chelsea win|
|LeBron explains why he gave a Grizzlies employee his game-worn shoes|
|Bangladesh cruise to ODI victory as seamers punish Windies|
|Football will win over violence, claims CONMEBOL president|
|Alcorcon support Reus Deportiu over unpaid players|
|Saponara explains cheeky celebration after last-gasp leveller|
|Godin and Filipe Luis return to Atletico training|
|Kick It Out condemns alleged racist abuse of Sterling|
|Emotional Oosthuizen clinches South African Open title|
|The Sunday Seven - 7 Key Opta facts for NFL Week 14|
|Martino salutes Atlanta´s grand plan|
|India´s tail must show greater application - Bangar|
|Mourinho: Diogo Dalot can be new Gary Neville|
|Sterling hits out at media coverage of black players|
|Lyon roars with defiance as Australia aim for unlikely victory|
|Bulls coach Boylen: Hooked starters ´embarrassing´ in record loss|
|Martinez pays tribute to Martino, Almiron after MLS Cup glory|
|LeBron: Final Wade matchup will be bittersweet|
|Alvarez-Kovalev rematch set for February 2|
|Newcastle Jets 2 Brisbane Roar 0: Sheppard, Jair score first A-League goals|
|India close in on victory in first Test|
|LeBron flirts with triple-double as Lakers down Grizzlies|
|Lomachenko unifies WBO, WBA titles with win over Pedraza|
|Joshua wants Wilder and Fury fights – Hearn|
|Mavericks rookie Doncic leads impressive fourth-quarter surge to beat Rockets|
|Martinez named MLS Cup MVP|