Kral is currently on-loan at West Ham from Spartak.
Asked about Spartak players who could play in the Premier League, Kral said: "It is hard to say.
"But, for example, Roman Zobnin has a good mindset, he is a typologically good player, and he is also well prepared physically. I don't mean muscles, but running and other qualities. But in general it's hard to say.
"You never know how you adapt to a new city or to the guys from the team, to a new language. My opinion is Zobnin, but you can never know for sure."
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