The ATP Challenger Napa (official name " Napa Valley Challenger ") was a tennis tournament in Napa , which was held in 2013 and 2014. It was part of the ATP Challenger Tour and was played outdoors on hard courts. The tournament was held as part of the USTA Men's Professional Pro Circuit Challenger Series by the US National Tennis Association . The game was played in the Napa Valley Country Club , which has nine outdoor courts.