INCHEON, SOUTH KOREA | After four years’ work on the LPGA Tour, Amy Yang broke through for her first tour victory Sunday in a playoff at the LPGA KEB HanaBank Championship. “I have been waiting for this championship for a long time, and I’m really happy get it in my home country,” Yang said. “I think still I can’t believe it.” Yang has been an LPGA member since 2009 and had lost in one playoff prior to winning in Korea. She fell to Yani Tseng at the Walmart NW Arkansas Championship in 2011. She also was runner-up at the 2012 U.S. Women’s Open. On Sunday, she shot 69 to tie with Hee Kyung Seo at 9-under par after 54 holes at Sky 72 Golf Club, then made a birdie on the playoff hole, the par-5 18th, to win. Yang began Sunday’s final round trailing co-leaders Katherine Hull-Kirk and Anna Nordqvist by one stroke. She surged into a tie for the lead with an eagle at the driveable par-4 15th that moved her to 8 under. She made a birdie at the 18th to tie Seo and force the playoff. Both players hit errant tee shots on the playoff hole, with Yang’s finding the right rough and Seo’s finding the left. Despite difficult third shots, both players found the green in regulation. Yang made her 15-foot birdie putt to win the tournament.