Fourth-seeded Yannick Noah, despite an ailing left knee, defeated Buster Mottram, 7-5, 6-2, in the third round of the U.S. National Indoor tennis tournament in Memphis, while No. 1 seed Jimmy Connors beat Raul Ramirez, 6-3, 6-3, and No. 3 Gene Mayer ousted Henri LeConte, 1-6, 6-0, 6-0. Eliot Teltscher beat Tomas Smid, 6-4, 6-0, and Brian Gottfried defeated Fritz Buehning, 5-7, 6-3, 6-4. Brian Teacher won when Chip Hooper was forced to retire, tendinitis in his left knee . . .

In Chicago, No. 1 seed Martina Navratilova beat Iva Budarova, 6-1, 6-1; Pam Shriver defeated Claudia Kohde, 7-6, 6-3; Tracy Austin escaped Anne Smith, 6-1, 7-6 (7-4), and unseeded Eva Pfaff upset sixth-seeded Sylvia Hanika, 5-7, 6-4, 6-3, to gain the quarterfinals of a $150,000 women's tournament.

In Port Washington, N.Y., David Tremaine of Rockville, playing in the first round of the boys 18-year-old division, upset No. 7 seed Ricky Peck, Spring Lake, N.J., 6-3, 6-7, 6-4. No. 2 seed Jeff Kerp, Baldwin, N.Y., beat Eric Vincent, Columbia, Md., 6-3, 6-0. In the girls 18 group, No. 5 Lee Shelbourne of Bethesda beat Robin Slater, Island Park, N.Y., 6-0, 6-3.