The Scottish Premiership side take on the champions of Kazakhstan on Wednesday.
Celtic manager Brendan Rodgers
Celtic have suffered a double injury blow ahead of their Champions League third qualifying round first-leg tie with Astana on Wednesday as the Daily Record reports that both Erik Sviatchenko and Kristoffer Ajer will miss the clash.
The Hoops were already without Jozo Simunovic, Dedryck Boyata and new signing Kolo Toure for the trip to Kazakhstan, the Record reports, so the last thing that Brendan Rodgers would have wanted was to lose another two of his potential centre-back options ahead of what promises to be a difficult tie.
The Record claims that Ajer will miss the trip due to a hand injury, while Sviatchenko could be sidelined for around three weeks.
That leaves Rodgers with Efe Ambrose as his only recognised senior option at the heart of defence, while Mikael Lustig and Eoghan O'Connell - who scored in the Champions Cup clash with Leicester City last week - appear to be the contenders to play alongside the Nigerian.
Perhaps more worrying for Rodgers will be the fact that Sviatchenko appears to have already been ruled out of the second-leg, as well as the start of the Scottish Premiership season.
The setback could see Ambrose handed one final chance to prove that he is reliable enough to feature in Rodgers' plans moving forward. The Record states that his future at Parkhead is up in the air, but it seems unlikely that he will be allowed to leave while the club's options are so depleted.