MOSCOW, June 23 Russian tennis players Andrei Rublev, Karen Khachanov and Aslan Karatsev will take part in the ATP-500 clay tournament in Hamburg, Germany, according to the organizers' page on Twitter. 250 Russians Daria Kasatkina, Varvara Gracheva, Anna Kalinskaya and Anastasia Potapova will perform. From the top 10 in the competition will perform American Danielle Collins. The tournament in Hamburg will be held from 16 to 24 July. The current winners are Spaniard Pablo Carreno-Busta and Romanian Elena-Gabriela Ruze.
