John McEnroe, analyst for CBS/USA Network in the 2-week U.S. Open that begins Monday, once was against women calling men's tennis matches. Now he praises women's tennis. "There's nothing like having four girls around the house. It gives you a totally different perspective," McEnroe said Thursday. . . . Keith Olbermann, who left ESPN on less-than-amicable terms, might wind up as host of an afternoon show on ESPN Radio's New York affiliate. . . . ESPN's Dick Vitale, TNT's Charles Barkley and ABC's Curtis Strange will appear at this weekend's annual Jimmy V Celebrity Golf Classic in Cary, N.C., with proceeds going to the V Foundation for Cancer Research. . . . CNN/SI, trying to boost its subscriber base from 18 million homes, has added more than 40 cable systems as it increases its live events.