Italian, German, South American ch. and US Amateur don't require to your basic criteria - money and big field.1968
British Hard Court Championships. This is the first “Open” tournament in history and its high significance derives largely from that. The best pros compete, the best amateurs do not compete. Ken Rosewall champion.
Italian Open. Tom Okker champion. Now, the best amateurs are competing.
**Pacific Southwest Championships. Super Tournament. Not only is this the fifth or sixth most important tournament from the amateur circuit, it sports a nice, US $22,500 purse. Laver, Rosewall, Arthur Ashe, Okker, Stan Smith, John Newcombe, Tony Roche, Roy Emerson, Richard “Pancho” Gonzalez, and nearly all the world’s top-25, in a Slam-like 128 player draw. Rod Laver champion.
U.S. Amateur Championships. Arthur Ashe champion.
Wembley (formerly Pro Major). Ken Rosewall champion.
French Pro (ditto). Rod Laver champion.
U.S. Pro (ditto). Rod Laver champion.
Madison Square Garden Pro. Tony Roche champion.
German Open. A fine clay-court tournament to help get the new era off to a good start – mostly amateurs, along with a few top pros. John Newcombe champion.
Buenos Aires. Another excellent clay-court Open, this time slightly more pros than amateurs, along with a lot of Argentine players. Laver and Gimeno were seeded one and two. Roy Emerson champion.
If you include the second MSG you need to include the first one too. But small draw for both.