Arsenal Donetsk's Ukrainian defender Oleksandr Zinchenko was injured in the recent English league game against Newcastle United (2-0) and the injury was quite serious.
The 26-year-old has injured his calf muscle, according to British media, and will not appear this season.
What's more, Zinchenko's appearance in June's games for Ukraine is now under question. And in the worst case scenario Oleksandr will be able to return to full training only before the start of next season.