Top seeds Mike DePalmer and Kathleen Cummings won in straight sets yesterday to capture the men's and women's titles in the USTA National Amateur Indoor Tennis Championships at Skyline Racquet Club.

Both DePalmer and Cummings got through the week-long tournament without losing a set. In yesterday's finals, DePalmer beat Warren Grossman, 6-3, 6-2, and Cummings defeated Amy Kneale of Arlington, 6-2, 6-2.

For DePalmer, a sophomore at Tennessee who lost in the quarterfinals of the NCAA tournament as a freshman last May, the victory was another step toward the pro circuit. He'll join the tour after this year's NCAA tournament.

DePalmer began quickly against Grossman, the No. 2 player at Harvard. DePalmer had two service aces against Grossman in easily taking the first game, and then watched his opponent commit five backhand errors to lose the next two games.

Although Grossman settled down and held service the rest of the set, DePalmer also held serve to take the set.

In the second set, Grossman, who was the 13th seed in the tournament, took 1-0 and 2-1 leads. Grossman came in behind a spin serve and volleyed the ball away from DePalmer for winners.

But DePalmer's strong left-handed strokes brought him to a 2-2 tie and he broke Grossman. The sixth game was an unfortunate one for Grossman. He had three straight break points but netted the ball on all three.

In the women's final, Kneale couldn't offset the consistency of Cummings, a Colorado junior who is ranked 48th in the world.