Ukraine's European Championship preparations have been disrupted by a bug that has swept through the squad.

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The co-hosts open up their campaign against Sweden on Monday, but they were beaten 3-2 by Austria in a friendly - after which coach Oleg Blokhin revealed a chunk of his squad, including Anatoliy Tymoschuk and Andriy Voronin, had been struck down by a stomach upset.

"Tymoschuk is still in bad condition, we have got him on a drip. And this is not funny. We have to wait for the doctors' verdict but the situation is far from funny," Blokhin said.

"I do not know the reason for the illness because we all ate different food. We have one week to recover...it's good that it did not happen on June 11."