(Reuters) - New Zealand's Lydia Ko, seeking her fourth Canadian Women's Open title before the age of 20, made a promising start when she carded a five-under-par 67 in the first round in Alberta on Thursday. The Korean-born teenager, four days after her silver medal- winning performance at the Rio Olympics, wasted no time getting back into the bread-and-butter swing of regular LPGA competition. Ko made the Canadian Women's Open her first LPGA victory when she triumphed in 2012 at the age of 15. More...