Rather than needing to lift the striker's spirits, Vlaar was delighted to be met by a determined Kozak who was already looking forward to the 2014-15 term.
He told AVTV: "I saw Libor this week. I went to his house for a cup of tea.
"He's doing well. It's hard for him. But he's positive and determined. He's already thinking of his recovery for next season.
"He has to take it easy with crutches at the moment. But we will all try to help him.
"His season is over. But he will be back strong next season. That's what he is going for and looking for.
"The players and staff visited him. It's always good to do that. I know what he's been going through. It's always good to have people around you. That was important. It's not just about football - it's about friendship too.
"The injury is obviously a big blow, for him and the team.
"I have some experience with long term injuries. I will try to help him to stay positive.
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