Jimmy Conners has committed to play in this summer's D.C. National Bank Tennis Classic after a five-year absence. The $200,000 tournament is scheduled to be played July 13-22 at Rock Creek Tennis Stadium.

Connors, winner of 105 professional tournaments, more than any other player in the history of men's tennis, will be playing in Washington for the fourth time. He won here in 1976 and 1978 . . .

Yannick Noah overcame a strained thigh muscle and a second-set confrontation with officials over a line call to beat Jose-Luis Clerc, 6-1, 7-5, for a berth in the semifinals of the $435,000 Italian Open championships in Rome.

In other matches, top-seeded Mats Wilander beat Henrik Sundstrom, 7-5, 6-2, and Boris Becker eliminated Jan Gunnarsson, 6-4, 6-4 . . .

Chris Evert Lloyd defeated Lisa Bonder, 3-6, 6-0, 6-2; Bettina Bunge eliminated Claudia Kohde, 7-5, 7-6; Kathy Rinaldi stopped Caterina Lindquist, 2-6, 6-3, 6-2, and Steffi Graf beat Kathy Horvath, 6-1, 6-3, to gain the semifinals of the West German championships in Berlin . . .

Top-seeded Pam Shriver overcame a shoulder problem to defeat Ann Henricksson, 6-3, 6-7, 6-4, and gain the semifinals of the $75,000 Victorian Indoor women's championships in Melbourne.