Lydia Ko atop Rolex Rankings for 54th week

Australian Lydia Ko extended her cushion atop the Rolex Rankings with her victory at the NW Arkansas Championship, and now has a 14.93-point average.

Brooke Henderson remained No. 2, well behind Ko at 8.55 points. Inbee Park is No. 3 despite being sidelined by a thumb injury, followed by Lexi Thompson and Sei Young Kim.

Thompson is the top-ranked American with two weeks remaining before the Olympic qualification deadline. The top 15-ranked players in the world will qualify for the Olympic Games in Rio de Janeiro, with a limit of four players per country. Beyond the top 15, players will be eligible based on the world rankings, with a maximum of two eligible players from each country that does not already have two or more players among the top 15.

Stacy Lewis is the second-ranked American at No. 9 in the world, followed by Gerina Piller (No. 16), Cristie Kerr (No. 20), Jessica Korda (No. 24), Brittany Lincicome (No. 25) and Morgan Pressel, who moved up to No. 28 with her tie for second …