Canada's Naomi Ko advances in US Girls' JuniorTULSA, Okla. (AP) Canada's Naomi Ko won two matches Thursday in the U.S. Girls' Junior to advance to the quarterfinals at Tulsa Country Club. The 17-year-old SI Staff | Jul 23, 2015Canada's Naomi Ko advances in US Girls' Junior / Published Jul 23, 2015SI STAFF