Ukraine forward Andriy Yarmolenko will not be rushed into returning for West Ham as his nation continues to fight the invasion by Russia.
Yarmolenko, 32, was given compassionate leave last week and returned to the club on Monday.
"He's really upset with the whole situation," said West Ham manager David Moyes.
"He realises the difficulty. He is a long way away and can't do anything about it."
Yarmolenko, who has won 106 caps for Ukraine, missed West Ham's 1-0 Premier League win over Wolves on Sunday.
The Hammers play Southampton in the FA Cup fifth round on Wednesday and Moyes says Yarmolenko will decide if he is ready to play.
"He came back in yesterday; we had a good chat," said Moyes.
"We won't rush him. If he feels fine, he will travel with the team. If he doesn't we will give him more time off.
"We will give him a chance to go with his own feelings."
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