Tennis freelance writer Ben Rothenberg, Thirty Love's first-ever guest, rejoins host Carl Bialik to discuss the story behind Rothenberg's investigation into Darko Grncarov, the socially progressive professional tennis player who everyone loved until he turned out not to be a professional tennis player.

Produced and edited by Jorge Estrada, with music by Lee Rosevere.

Rothenberg's article on Grncarov: https://slate.com/culture/2018/02/how-darko-grncarov-tricked-serena-williams-and-the-bbc.html

Rothenberg on Twitter: https://twitter.com/BenRothenberg

Rothenberg's 2014 article on Neil Harman: http://www.slate.com/articles/sports/sports/2014/07/neil_harman_plagiarism_the_all_england_club_discovered_journalistic_malfeasance.html

Carl's 2017 article featuring video of his match against Ben: http://www.tennisabstract.com/blog/2017/04/07/little-data-big-potential/