Liam Rosenior confirmed Chelsea could be without captain Reece James for weeks after he sustained yet another hamstring injury at the weekend.
James played the duration of Chelsea's 1-0 defeat to Newcastle United, but has since been ruled out of their Champions League last 16 second leg against Paris Saint-Germain.
The Blues trail the defending European champions 5-2 ahead of Tuesday's clash, and they are also winless in their last five Champions League games against PSG (D2 L3).
And their task has been made even more difficult by the absence of James, who has made 36 appearances in all competitions for Chelsea in 2025-26.
The 26-year-old has been impacted by injuries throughout his career and had looked to be over those issues, but he was not spotted at Chelsea's training ground in Cobham for Monday's session, with Rosenior explaining why later in the day.
"With Reece, he felt something in his hamstring at the end of the game against Newcastle [United]," Rosenior told reporters.
"Really disappointing. We don't know the full extent, but it rules him out for tomorrow's game.
"It could be [weeks]. With a hamstring injury, it is never great. Hopefully, we can get him scanned, know the full extent, and go from there."
Rosenior also confirmed that fellow right-back Malo Gusto was unavailable through illness, though Estevao was back in training for the Blues.
Chelsea were well-beaten at the Parc des Princes last time out, with Khvicha Kvaratskhelia coming off the bench to ensure Luis Enrique's side were in a commanding position.
The Blues have lost their last three games in the knockout stages of the Champions League, and have never previously lost four in a row.
They conceded five goals in the first leg of this tie, already just two short of the most goals they have conceded in a two-legged knockout stage tie in the competition (seven v Bayern Munich in 2019-20, round of 16).
Only Deportivo de La Coruna have gone to eliminate the holders in the knockout stages after losing the first leg by as many as three goals, with the Spanish side beating AC Milan in the 2003-04 quarter-finals.
And though Rosenior tempered expectations of a turnaround, he insisted that his team will attempt to match PSG all over the pitch.
"If you look at the game in isolation and the scoreline, we were punished by very good players for our own mistakes," Rosenior said.
"We have been undone in games by those moments. We can't make mistakes tomorrow.
"We have to remember PSG are European champions for a reason, but we know we can compete."
The Opta supercomputer has handed Chelsea just a 6% chance of reaching the quarter-finals, with only Tottenham (4%) and Atalanta (0%) assigned a lower probability, though Joao Pedro was optimistic about his team's chances.
"I think this week was difficult for us. We know our strengths, we still believe because we showed in the Club World Cup when we won 3-0," Joao Pedro said.
"The group believe, the manager believes, the fans should believe as well."
Wizprince11
0
an Wich you don't have it
Which I have too
Mimeklmnry
0
after given a new contract 🤣🤣 this James guy no what he's doing
Vioaciorsz
0
suck this piece of shit rosenairi
Daybilpst
0
The world Champion 🏆 is a curse to Chelsea FC don't be surprised 😲😯 if Chelsea finished at Uefa Europa Conference league level 🎚️ this season
an Wich you don't have it
fiweikmsty
1
without James and Gusto, let Chelsea just surrender to PSG,
yonbilmsty
2
useless coach go back were u come feom
sudalmntuz
1
just after signing a contract
KehindeSeun
0
This Liam as a coach is useless, he doesn’t know what he’s doing
did I blame him No I blame the owner
KehindeSeun
0
But you guys said maressca should be sack, now again you’re still not satisfied. Maressca better than physic lecturer by far
I never ask for that bro.. maresca is not a world class coach but to me I believe in young Coach because they learn new ways and they develop very fast
Wizprince11
0
The world Champion 🏆 is a curse to Chelsea FC don't be surprised 😲😯 if Chelsea finished at Uefa Europa Conference league level 🎚️ this season
Noebdikmr
0
ewe don loose be that
ColinsGooner
3
It's Bad news for Chelsea,wish you a speedy recovery Captain fantastic
Austineluv8
0
maresca and Rose do use our 2 center back in same match which is stupid decision, James and gusto always have this issue of Hamstring injuries why will you use them together then who is backing up who. James is fragile while gusto should have been backup for him but you keep using them together and they get injured together sometimes... James should not have play against new castle that should have been gusto match and PSG should have be for James.. how will you even think if using James for 3 4 straight game is that not stupid decision now you get him injured.. I don't blame you I blame this stupid owner we have because we already have a coach that knows his players and suddenly you sack him my question now is new coach now solve the problem we face during maresca... maresca is even finding ways to win big games but this guy as not won any big games imagine arsenal beat this guy's 3 times within a month this is madness with maresca PSG can never won us 5-2
This Liam as a coach is useless, he doesn’t know what he’s doing
SGTSingam
2
Captain needs rest 🤕🤢
Richard0010
0
maresca and Rose do use our 2 center back in same match which is stupid decision, James and gusto always have this issue of Hamstring injuries why will you use them together then who is backing up who. James is fragile while gusto should have been backup for him but you keep using them together and they get injured together sometimes... James should not have play against new castle that should have been gusto match and PSG should have be for James.. how will you even think if using James for 3 4 straight game is that not stupid decision now you get him injured.. I don't blame you I blame this stupid owner we have because we already have a coach that knows his players and suddenly you sack him my question now is new coach now solve the problem we face during maresca... maresca is even finding ways to win big games but this guy as not won any big games imagine arsenal beat this guy's 3 times within a month this is madness with maresca PSG can never won us 5-2
But you guys said maressca should be sack, now again you’re still not satisfied. Maressca better than physic lecturer by far
KehindeSeun
3
maresca and Rose do use our 2 center back in same match which is stupid decision, James and gusto always have this issue of Hamstring injuries why will you use them together then who is backing up who. James is fragile while gusto should have been backup for him but you keep using them together and they get injured together sometimes... James should not have play against new castle that should have been gusto match and PSG should have be for James.. how will you even think if using James for 3 4 straight game is that not stupid decision now you get him injured.. I don't blame you I blame this stupid owner we have because we already have a coach that knows his players and suddenly you sack him my question now is new coach now solve the problem we face during maresca... maresca is even finding ways to win big games but this guy as not won any big games imagine arsenal beat this guy's 3 times within a month this is madness with maresca PSG can never won us 5-2