U.S. Professional Challenge Tour over Riggs in three straight sets using "a devastating series of well-placed backhand shots and cannonball serves." Kovacs and Riggs both won seven matches against each other on the year. The WPPA organization disappeared before the end of the year and did not issue any official rankings. 1948 Kovacs won the North Florida Pro championships in St. Augustine in January beating Bill Lufler in the final. Kovacs won U.S. Professional Clay Court Championships at Miami in December (defeating Jimmy Evert in the final). Kovacs said in a statement after the match he renounced the title for the following reasons: "First - the tournament was not sanctioned by the Professional Lawn Tennis Association. (PLTA). Second there was not a full representative field of ranking players competing for the title. As of Jan. 1, 1949. I will participate only in PLTA sanctioned tournaments." The PLTA ranked Kovacs joint third with Budge. 1949 In January Kovacs won the U. S. Pro Clay Court Championships in St. Augustine. In the semis he beat Segura. "Kovacs had his serve working wonders and used his power". In the final he overcame Van Horn in five-sets. 1950 Kovacs won the U. S. Pro Clay Court Championships in March over Van Horn in the final, displaying an agile change of pace. In June, at the U.S. Pro Tennis Championships at the Cleveland Skating Rink on clay, Kovacs defeated Parker in the quarter-finals, losing only one game in a three-straight-set win. Parker was the reigning French champion on clay. Kovacs then defeated Riggs in four sets to reach the final. In the final, at 4-4 in the fourth set, he developed leg cramps and retired, losing to Segura, who had defeated Kramer in the other semifinal. Kovacs won the Canadian Pro Championships at Quebec City on clay in September (over Van Horn in the final). Kovacs was third in the PLTA rankings. 1951 Kovacs won the U. S. Pro Clay Court Championships in March over Earn in the final. In June Kovacs and Parker would play against each other in the semi finals of the Canadian Professional Championships at Quebec City on clay, Kovacs winning in straight sets (Kovacs lost to Segura in four sets in the final). Kovacs' greatest pro tournament result was winning the International Pro Championships or US Pro Tennis Championships (according to the PTPA) held at Lakewood on cement just outside