ROGERS - World number one Stacy Lewis fired a six-under 65 on Sunday to seize an emotional come-from-behind triumph in the LPGA Northwest Arkansas Championship.Lewis, who attended the University of Arkansas in nearby Fayetteville, collected her 11th career victory and third of the season with a 12-under-par 201 in the 54-hole event. She also won the North Texas LPGA Shootout and ShopRite LPGA Classic, but she admitted this one was tougher. "I can tell you I was more nervous today than I was at the US Open last week," said Lewis, who was the focus of exuberant support from fans all day. "I think a little bit of 18 was relief that it was done because I was so stressed out all day and so on edge just wanting to pull every shot off," she added. "But then it was just excitement to hear the crowd react the way they did and just the people just to go nuts. "I mean, that's why I play," Lewis added. "I play to get in the heat of the battle, to have that chance to win at the end." New Zealand teenager Lydia Ko also fired a final-round 65 to jump into a share of second place with US veteran Cristie Kerr (67) and American Angela Stanford (67) on 202. South Korea's Ryu So-Yeon closed with a 69 for 203, one stroke in front of Chella Choi, of South Korea, and Norway's Suzann Pettersen.