River Valley High girls tennis won 9-0 at Mira Loma Thursday to improve to 3-2 in the Foothill Valley League and 12-4 overall. Valeria Ramirez and Sanah Kahlon each won in straight sets (6-0, 6-0), while Gianna Lapera, Sam Baker, Claudia Dudek and Mia Gill each notched wins in singles. All three RV doubles teams won in straight sets to close the match out and begin to focus on Placer at home …