The Pittsburgh Riverhounds will host Tulsa FC tonight at Highmark Stadium in the first game of the Lamar Hunt U.S. Open Cup. This is the oldest soccer tournament in the United States and is single elimination. The Riverhounds will also face Tulsa this Saturday in a United Soccer League road game. Pittsburgh began the season winless, but have won their last three games, including a 1-0 win over Miami last Saturday.