Paul O'Hanlon's victory in the Irish Closed Championship at Belvoir Park, Belfast, propelled him 231 places to No 126 in The R&A World Amateur Golf Ranking, the biggest move of the week as Rickie Fowler held on to the top spot and fellow American Zack Sucher climbed three places to No 10.
Sucher joined the top 10 thanks to a good finish in the Monroe Invitational at Pittsford, New York, a week after gaining fourth place in the Sunnehanna Amateur.
Other movers in the top 20 were Rob Grube (USA), up seven places to No 14, and Kyle Stanley (USA), up two places to No 20.
Of the 12 event winners in week 25, seven are newcomers to the Ranking. Players from 34 countries fill the top 350 places.