By Randy Walker @TennisPublisher After an appearance on the Jimmy Kimmel Show, John McEnroe has fanned some flames about, yet, another “Battle of the Sexes” match, this time featuring himself, at age 56, against world No. 1 Serena Williams. (See here: https://www.youtube.com/watch?v=XwzMJOhderk) While all sports fans are quite familiar with Billie Jean King’s socially […]