What is stopping Indian tennis from that Singles Grand Slam victory?

As the Wimbledon is on, one wonders about Indian tennis. The nation has produced so many doubles and mixed doubles grand slam champions over the years. Yet, India hasn’t been able to end the drought of a singles grand slam title so far! Click here for answers to many such prodding questions on Indian tennis: https://www.powersportz.tv/ (Talking turkey with Kanthi)