The ASICS/Vaughan Junior and Cadet National Championships are considered the most prestigious youth wrestling events in the nation and have helped develop other numerous athletes who have gone on to win World and Olympic medals for the United States.    Greco-Roman competition will take place July 24-27, men's freestyle will compete July 28-31 and women's action will be held July 30-31. This will be the third year that a women's division will be featured at the Junior Nationals. The newest Olympic sport will be showcased as the largest wrestling competition in the world this year.    Last year, 111 women competed in the Women's Junior Nationals and that number is expected to soar this year. The ASICS/Vaughan Junior and Cadet National Championships are heralded as the largest wrestling tournament in the world.    Over 3,500 wrestlers from 49 different states will compete at the event. Two styles of wrestling will be competed at both the Cadet and Junior levels: Greco-Roman and freestyle. Women will compete in freestyle only.    Two wrestlers that captured titles in both Junior freestyle and Greco-Roman last year return to defend their titles this year: Dustin Schlatter of Ohio and Brent Metcalf of Michigan.    In men's Junior freestyle competition, six other wrestlers return to defend their titles, including Paul Donahoe of Michigan, who has already won two Junior national titles in freestyle.    T.J. Sebolt of Iowa and Tony Mustari of Colorado are two of the top high school Juniors in the nation, along with Schlatter and Metcalf.    High school seniors  Coleman Scott of Pennsylvania, Rocco Caponi of Ohio and Matt Fields of Iowa also look to repeat as champions. Donahoe will attend the Univ. of Nebraska next fall, while Scott will attend Oklahoma State Univ., Caponi will attend the Univ. of Virginia and Fields will attend the Univ. of Iowa.    In Junior Greco-Roman action, defending champions Joe Weygand of Pennsylvania, Brandon Zoeteway of California, Mike Rodriguez of Washington, Jordan Crass of Wisconsin, Rocky Cozart of Florida and Dustin Fox of Ohio are all expected to return to defend their crowns.    Weygand will attend Drexel Univ., Rodriguez will attend Cornell Univ., Crass will attend the Univ. of Wisconsin and Fox will attend Northwestern Univ. next fall.    In women's competition, seven wrestlers are eligible to return to defend their titles and one of those women will be looking to become the first three-time winners of the Junior Women's National Championships.    Samantha Lang of Oregon will be aiming for their third national titles at this year's competition.    Also expected to defend their national titles will be Ashley Smetana of Pennsylvania, Kelli Rasmussen of Minnesota, Claire DuPont of Colorado, Deanna Rix of Maine, Ali Bernard of Minnesota and Lizz Sanders of Iowa.    The top 15- and 16-year old wrestlers in the United States will battle in freestyle and Greco-Roman for national titles and All-American honors at the Cadet National Championships.    Many of last year's Cadet national champions in both freestyle and Greco-Roman will compete at the Junior level this year.    Returning Cadet freestyle champions who are still eligible to compete at the Cadet level are Conner McDonald of Delaware and Matthew Kyler of Pennsylvania.    In Cadet Greco-Roman, three champions from last year are still eligible to compete at the Cadet level: Donny Altman of Kansas, Scott O'Donnell of Missouri and Tim McGoldrick of Pennsylvania.    Henry Cejudo of Arizona, Troy Nickerson of New York, Matt Dragon of Pennsylvania, Taylor Moore of Missouri and Justin Neal of Maryland all captured Cadet titles in both styles last year, but will look to make a major impact on the Junior level this year.    Other 2003 Cadet champions who will be eyeing Junior-level success are Mike Thorn of Minnesota, Jake Swensen of Utah, Dallas Seavey of Alaska, Matt Lopez of Arizona, Kyle Bounds of Washington, Garrett Scott of Pennsylvania, Neil Erisman of Kansas, Brandon Simpson of Missouri, Alton Lucas of New York, Louis Caputo of Missouri, Erik Nye of California, Rollie Peterkin of Massachusetts, Michael Rowe of Maryland, Joseph Cornejo of Kansas, Braden L'Amoreaux of Michigan, Nick Marable of Tennessee, David Craig of Florida, Hudson Taylor of New Jersey and Robby Smith of California.    Last year, the combined ASICS/Vaughan Junior and Cadet National Championships continued to be the largest wrestling tournament in the world with 4,276 entries.    To be eligible for Junior competition for both men and women, a wrestler must be born Sept. 1, 1984 or later and be enrolled in grads 9-12 during the 2004 Spring semester. Only wrestlers born in 1988 or 1989 are eligible to compete at the Cadet level.