Unseeded Mark Lichtenstein and Keith Merron, a youthful and somewhat manic doubles team. Managed to get a grip on themselves to win the Southeast Tennis Association tournament doubles championship yesterday at Rock Creek Tennis Stadium.

The two 22 - year - olds defeated the experienced second-seeded team of Phil Lucas and Willis Thomas, 6-4, 3-6, 6-3, in a match of drastic momentum swings.

Merron, a graduate of Northern Colorado University, and Linchtenstein, a George Washington University graduate from Bethesda, breezed in the first set on Lichtenstein's ground game and Merron's net play after they broke Thomas' serve at 2-1.

The second set appeared to be a replay of the first after the same service break. However, up 3-1 and at break point, Lichtenstein and Merron let their opponents off the ropes and lost 19 of the next 21 points and the set.

As far down as Thomas and Lucas seemed in the first set, Lichtenstein and Merron dropped deeper after the second.

In the third, the winners survived eight deuces and three break points in the fifth game, went on to break Thomas' serve in the eighth game andserved out the match.

In other final matches, Lucas and Olin Dupre topped Andrew Gladsden and Amen Hillow, 7-5, 6-4, for the Junior Veteran title; Doris Briggs and Nancy McKenzie downed Terri Gill and Barbara Faulkner, 3-6, 6-3, 6-4, for the women's title and Barbara Faulkner and Harry Cooley beat Doris Briggs and Gladsden, 6-7, 6-3, 7* -6, in the mixed doubles final. CAPTION: Picture, Keith Merron and Mark Lichenstein (left to right, foreground converge on volley against Phil Lucas and Willis Thomas. By James M. Thresher - The Washington Post