"Muscle problems with Joe Matip, (a) little bit with Lucas Leiva. Small problem with Ragnar Klavan, could be also not enough time," Klopp told a news conference.
"Adam (Lallana) is back on the pitch. (He) should be involved next week in normal training.
The manager was less confident about skipper Henderson's chances of recovering from a foot injury before the end of the season. "I don’t know, we will see," he said. "At this moment he cannot train. We have to wait."
Liverpool are currently third in the Premier League, having won five of their last seven games, and have lost just once in 16 games at Anfield all season.
But Klopp believes Sam Allardyce's Palace, who are not yet safe from relegation, are capable of posing an aerial threat for his defence, with former Liverpool striker Christian Benteke leading the line for the visitors.
"When the ball is in the air Christian is a major threat. We felt it a lot of times here," the German added.
"If we let them cross 50 balls it's pretty likely he will have some dangerous headers.
"But if you only concentrate on Benteke, you have (Wilfried) Zaha and (Andros) Townsend around him. That is one of the best offensive lines in the Premier League."
Crystal Palace, who are 15th in the league, have won five of their last seven games to move seven points clear of the relegation zone with six games to play.
(Reporting by Hardik Vyas in Bengaluru,; Editing by Neville Dalton)
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