Most of Kostyuk’s family is in Kyiv, including his father and grandfather.
He is in regular contact with them and said it was scary how they had all become used to the “horror” of war.
“Like, I’m more stressed being out and watching than actually being there,” said Kostyuk, who visited Kyiv in October.
His mother sends him updates about the Russian attacks, including how he and his neighbors plan to snatch coffee before the expected wave of missile attacks.
The world No. 61 said she would go to Ukraine even if it was not safe, but she has no doubt that her country will eventually win.
“I don’t think we would have even had a chance if we didn’t think like that,” she said.
“It just takes time and unfortunately leads to a lot of damage and death, including a lot of innocent people.
“It’s our belief, I think, and we just have to come back stronger.”