Complex sentence: Since four skaters above her were age-ineligible, she was named in the Russian team to the European Championships, although there were initially concerns that she would not receive her visa in time and would have to be replaced by Sofia Biryukova.
Split into simpler sentences: Since four skaters above her were age-ineligible, she was named in the Russian team to the European Championships. Initially, there were concerns that she would not receive her visa in time and would have to be replaced by Sofia Biryukova.