Istomin and Martic win Inaugural Chicago Titles By Jonathan Kelley (September 9, 2018) CHICAGO - There were a lot of similarities between the two winners of Sunday’s singles finals at the first-ever Chicago Oracle Challenger Series. They both were second seeds in their respective tournaments. They both won their first pro tournament of 2018 this week. And they both won … [Read more...] about Istomin and Martic win Inaugural Chicago Titles