Liverpool manager Jurgen Klopp said he does not expect central defenders Virgil van Dijk and Joe Gomez to be fit enough to play in the rescheduled European Championship in June and July.
Dutch international Van Dijk hurt his knee following a poor challenge by Everton goalkeeper Jordan Pickford in October and needed surgery, while Gomez also underwent a knee operation after picking up an injury while training with England.
"That's not my decision. But the information I have in the moment is it'll be unlikely," Klopp told reporters on Saturday, adding that both players' injuries were "really serious."
Klopp plays down prospect of Van Dijk or Gomez facing Mainz
"So, not that I don't let them go because I don't want to have to do that anyway, but it's because of the extent of the injury.
We hope they'll be ready to start pre-season with us.
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Liverpool have had to contend with several injury setbacks in defence this season, with Joel Matip also ruled out for the season with an ankle injury.
"The two of them (Gomez and Van Dijk) look better than Joel because he's still in what looks like skiing boots," Klopp said.
"But he's here as well. Joe isn't running, Virgil's already running, but this is really a tough one."
Liverpool, who are eighth in the league with 43 points, visit Wolverhampton Wanderers on Monday.
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