The second leg of the charity event is taking place in Croatia’s coastal resort on June 20-21. World no.1 Novak Djokovic leads the field, joined by Alexander Zverev, Grigor Dimitrov, Borna Coric, Marin Cilic, Andrey Rublev, as well as Pedja Krstin and Danilo Petrovic, finalists of the HTS tournament.