The second post war lawn tennis championships opened before a huge crowd at the All England Club, Wimbledon today. In accordance with tradition play opened with a match featuring the reigning champion. Yvon Petra, of France, winner of last year's men's singles, met D.W.Butler of Great Britain, on the Centre Court. Picture Shows:Pancho Segura employs a double handed forehand against Drobny during their match at Wimbledon today. 23 June 1947