HOUSTON — Adriana Leon scored three goals and teenage forward Olivia Smith celebrated her first senior start with a goal to help Canada defeat Paraguay 4-0 on Sunday and remain unbeaten at the CONCACAF W Gold Cup. Captain Jessie Fleming had a chance to make it 5-0 from the penalty spot in second-half stoppage time, after substitute Simi Awujo was brought down, but sent her spot kick off the crossbar. It was a first-ever senior meeting between 10th-ranked Canada and No. 50 Paraguay. And it proved