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]."
|Perez pays tribute to Ronaldo and Zidane|
|Cazorla concedes Arsenal lacked self-belief under Wenger|
|Get King Kong for AJ! Joshua understands critics´ demands|
|Korea change sees Bertens take title in Seoul|
|I love Bilic, but I let him down – Arnautovic|
|He will never fight me! Fury hits out at ´ponderous´ Joshua|
|Azpilicueta convinced Hazard can be ´the best´|
|Wigglesworth´s career in Opta numbers as he breaks Premiership record|
|Ronaldo has nothing to prove, says Allegri|
|Federer shines as Europe hold narrow lead at Laver Cup|
|Astros, Yankees and Indians record dramatic wins|
|Pliskova too strong for Osaka in Tokyo final|
|Kyle Busch comes from behind to win again in Virginia|
|Dybala can play as a striker – Allegri|
|Pochettino never doubts ´special´ Kane|
|NASCAR results at Richmond: Kyle Busch comes from behind to win again in Virginia|
|McIlroy just worried about himself at Tour Championship|
|MLS Review: Atlanta stay clear of Red Bulls|
|Rose reminds everyone Woods has been here before|
|Cronk in doubt for Grand Final due to ´severe´ shoulder injury|
|Timberwolves sign Towns to extension|
|Hearn wants Wilder for Joshua, not ´un-entertaining´ Fury|
|Woods pleased with putting consistency|
|Ballon d´Or not a focus for Asensio|
|Man City star Mendy revels in Joshua triumph|
|Braves clinch first NL East title since 2013|
|I want Wilder, says Joshua|
|Inter must live on the edge to win, says jubilant Spalletti|
|Woods leads by three at Tour Championship|
|Bordeaux end Clermont´s perfect start, Zebo at double in Racing win|
|Lopetegui not worried about Courtois footwork|
|Joshua finds emphatic answer to Povetkin challenge|
|BREAKING NEWS: Brutal Joshua knocks out Povetkin in seventh round|
|Real Madrid can´t win 5-0 every week - Varane|
|Al Ahly 4 Horoya 0 (4-0 agg): Egyptian giants reach CAF Champions League semi-finals|
|Kings upset Warriors, Leinster batter Edinburgh|
|Son committed to Tottenham amid Bayern links|
|Simeone hails Atleti´s best LaLiga display of the season|
|Kovac: Bayern ´dominated´ Schalke in 2-0 win|
|Pochettino unimpressed with Tottenham´s tense finish|
|Campbell gains revenge as Price is halted by injury|
|Tottenham fatigue rumours are a myth, claims Rose|
|Widnes defiant after Super League relegation, Saints outclass Wolves|
|NFL must go back to college to eradicate the tie|
|Real Madrid 1 Espanyol 0: Asensio downs old club to earn narrow win|
|Sampdoria 0 Inter 1: Brozovic wins it late after VAR takes centre stage|
|Rudy takes blame for James goal in Bayern win|
|Tiger charges into four-shot lead|
|Players have given their lives to Burnley - Dyche|
|QPR 0 Norwich City 1: Pukki hits winner as hot streak continues|
|Nuno proud of Wolves character in Man United draw|
|Playing for England my dream, says in-form Maddison|
|Brighton and Hove Albion 1 Tottenham 2: Kane on target as Spurs issue firm response|
|Schalke 0 Bayern Munich 2: James and Lewandowski deliver another win|
|Getafe 0 Atletico Madrid 2: Lemar inspires routine win|
|Championship Review: Monk ruins Leeds´ unbeaten streak, McGinn screamer fails to save Villa|
|Bale benched for Real Madrid-Espanyol|
|Biggar fails to rescue Saints at Bath, Bristol and Wasps win|
|Zaha affected by back injury – Hodgson|
|Mourinho slams Manchester United attitude after Wolves stalemate|
|Herbert holds Portugal Masters advantage|
|Warnock blasts ´elementary´ Cardiff mistakes|
|Shaqiri substitution not easy for Klopp|
|Guardiola hopes for even more to come from Aguero|
|Fellaini accepts United closing gap to Premier League summit will be difficult|
|Klizan to face Thiem in St. Petersburg final, Bachinger shocks Nishikori|
|Klopp: Van Dijk injury not serious|
|Mourinho annoyed by Man Utd´s blunt attack in Wolves draw|
|Valverde not ready to consider Barca contract extension|
|Gattuso wary of wounded Atalanta as Higuain receives further advice|