Djokovic, Federer and Nadal, who all have earned more than $100 million in career prize money, have proposed that the top 100 men’s singles players contribute to the relief fund on a sliding scale, with those in the top five contributing $30,000 and those ranked from 51 to 100 contributing $5,000. Top 20 doubles players would also contribute $5,000 each.
Article source: https://www.nytimes.com/2020/04/21/sports/tennis/more-than-6-million-in-relief-coming-for-lower-ranked-tennis-players.html