America's Adam Mitchell won the Porter Cup at Niagara Falls Country Club last week to climb into the top-50 of the World Amateur Golf Ranking. His 28-place rise makes him the new number 23, 12 places behind Venezuela's Jhonattan Vegas, whose tie for fifth place at the same event took him up 35 places to 11th.
The rise of Vegas and Italy's Andrea Pavan - who came close to victory at the South of England Amateur - means that the top 20 of the World Amateur Golf Ranking now contains players from 13 different nations, with the top seven players all from different countries.
Rickie Fowler is once again in the top spot after his creditable tie for 40th place in last week's Nationwide Tour event, the Children's Hospital Invitational. Also playing in the event was another American, Sihwan Kim, whose tie for sixth boosted him to 12th spot in the ranking, and Colt Knost, who in 2007 became the inaugural winner of the McCormack Medal for the year's top amateur. Though Knost didn't challenge at the weekend, since moving to the professional ranks he has already won two Nationwide Tour tournaments and accumulated enough prize money to guarantee himself full PGA Tour playing privileges for next season.
With England's Chris Wood having made the decision to turn professional following his wonderful performance at Birkdale, Ireland's Shane Lowry moves up to a new high of fifth place. Tommy Fleetwood, the 17-year-old who was runner-up at The Amateur Championship in June, is now the top-ranked English player at 33rd place. Top Scot is Callam Macaulay in 55th place, and top Welshman is Nigel Edwards at 111th.