I can provide some details on this. According to the latest stetment by Tarpishchev (president of russian tennis federation):
MSingles: Medvedev, Rublev, Khachanov*, Safiullin
WSingles: Kasatkina, Samsonova, Aleksandorva, M.Andreeva
2 important notes:
- he said nothing about doubles (despite of the high enough ranking position of Zvonareva)
- he remarked that this squad will take part if the athltes will be allowed by compete *
* by now we know about at least one case of russian tennis player (Khachanov) beeing accused of pro-war activity in soical networks.