Chandigarh, July 21 -- Ajay Singh and Yashraj S Dalvi booked berths in the next round in the boys' under-18 qualifying round matches of the AITA Super Series Tennis Tournament for Boys' and Girls' under-16 and under-18 at Chandigarh Lawn Tennis Association (CLTA) Tennis Stadium, Sector 10, Chandigarh, on Saturday....