Four young Indians have been selected for the AO27 Ballkids Programme after national trials at New Delhi. New Delhi [India], October 26: The Australian Open successfully concluded the national trials for its AO27 Ballkids Programme at the R.K. Khanna Tennis Stadium in New Delhi.The trials brought together 60 shortlisted participants from across India, who advanced through city-level trials held in Delhi, Mumbai and Bengaluru, culminating in the selection of four young participants.