Led by Tommy Hitchcock Sr., a team of Americans played England's Hurlingham Club in the first international polo match at Newport, R.I. 68 years ago this week. Since polo had been played in the U.S. for only 10 years, the American challenge surprised but did not dismay the English club. The Britishers accepted, determining to teach the cheeky Americans a lesson. They did. Hurlingham won the first match 10-4, the second 14-2, to sweep the series and send the challengers back to the practice fields.