Tandreia Green, the 5-foot-11 all-Met player of the year, will have her toughest defensive assignment of the year tonight.

When the Vogues of Virginia play Iowa in the first round of the 1985 AAU/USA Junior Olympic Girls National Basketball Championship at Lake Braddock High School at 8:30, Green, a senior-to-be at H.D. Woodson High School, is scheduled to guard Katie Abrahamson, a two-time all-state player from Cedar Rapids Washington High School.

But the matchup between Green and Abrahamson -- who is 6-2, averaged 20.3 points and 8.4 rebounds per game, scored 2,391 points in her high school career and will play for Georgia -- is only one of several that is expected to develop as the 61-team, double-elimination dual national tournament proceeds throughout the week at four sites in Northern Virginia and culminates Saturday, July 6, with the finals at Lake Braddock. Other games will be at George Mason University's physical education building and at Chantilly and Fairfax high schools.

Twenty-eight teams from around the nation will compete in the 18-and-under division and 33 teams will play in the 16-and-under group. The Vogues of Virginia, coached by Tommy Orndorff, are representing the Potomac Valley AAU in the 18-and-under bracket, and a team bearing the same insignia, coached by George Washington Coach Denise Fiore, is entered as the Potomac Valley representative in the 16-and-under bracket. Fiore's team plays the Pacific Northwest entry Saturday at 4:30 at Lake Braddock.

Because the Vogues of Virginia basketball organization is conducting the tournament, it has a secondary -- or "host" -- team in each age group. The 16-and-under host team plays New Jersey at 2:30 at Lake Braddock. The 18-and-under host team plays Arkansas at 6:30, also at Lake Braddock.

Aside from Green, the 18-and-under Vogues team's front line includes her teammate at Woodson, all-Met Kammy Brown, and 5-10 center-forward Tracey Earley from Magruder, who is going to George Washington. At the guards, Orndorff will use 5-7 Nikki Arwood from Annandale, who will attend Georgetown, and point guard Lauren Romeo from Churchill High School, who hopes to walk on at Notre Dame next season.

Two all-Met players, Christy Winters from South Lakes and Penny Moore from Stuart, lead the 16-and-under Vogues team.

"If the 16-year-old team has a good tournament," Orndorff said, "they could win the tournament. It's being optimistic, but there is a real hope."