Aussies

KEN ROSEWALL, 19 (5 ft. 7� in., 148 lb.): Slender and dark, looks more like a ball boy than a top internationalist. Has great "little" game, reminiscent of Frankie Parker's. Backhand magnificent, so is footwork and control. His forehand is more than adequate, but he lacks the big service and the volley. Could improve with a more striking offense. Very dangerous when "hot." Beat Tony Trabert at Wimbledon, then lost to Jaroslav Drobny in upset finals.

REX HARTWIG, 24 (5 ft. 9� in., 168 lb.): Stocky, strong, better at doubles than singles, but at times a brilliant match player despite lack of any major singles title. His shot repertory shows no real weakness, and he moves well. It is difficult to fault this powerful stroker except for his one major deficiency: he never manages to play the important "big" match at the right time. Nonetheless, a possible long shot bet at Forest Hills.

LEW HOAD, 19 (5 ft. 11 in., 170 lb.): The Aussies' best Davis Cup man; has Kramer's "big" game. Service and booming volleys are first class, forehand stronger than backhand, net game good, at times brilliant. Court generalship is improving, competitive spirit excellent. Lacking in experience, he is considered by some better than Kramer at 19, but inconsistent concentration has led to defeats by too many second-stringers.

ROY EMERSON, 17 (6 ft.� in., 158 lb.): Most highly regarded new whiz kid on Aussie squad, reminds experts of Hoad two years ago. On his first trip to the U.S., he shows great tennis sense and rarely makes a wrong play. Possesses fine shots. Another year under tutelage of Coach Hopman should tell if he'll be great or not. Most notable victory was over Hoad in recent tournament at Newport. Anxious to learn, he can be dangerous.