US Open Tennis The Koz Speaks with Open Juniors Written By: Dave "The Koz" Kozlowski Published: Sep 6, 2017 Updated: Sep 6, 2017 | Share | Facebook 𝕏 | Twitter | RedditDave “Koz” Kozlowski caught up with a number of American players in the US Open Junior tournament. Several Americans in both the boys and girls recorded upset victories. | Share | Facebook 𝕏 | Twitter | RedditAbout the AuthorDave "The Koz" Kozlowski