"[9] Jack Kramer writes in his autobiography that Kovacs "was a big attractive guy, with a great smile—sort of a Nastase type, only harmless, not mean."

[18] Kovacs beat Eddie Alloo in the final of the Northern California indoor tournament in San Francisco in February.

[21] Kovacs was not selected by the USLTA to the U.S. Davis Cup team due to a controversy over his tennis coach[22] and did not play in Europe.

[28] In July, Kovacs beat Elwood Cooke in five sets in the final to win Nassau Country Club Invitation Tournament in New York.

[29] In July, Kovacs beat Seymour Greenberg to win Eastern Slopes Gold Racquet tournament in New Hampshire.

[38] Kovacs won the title at the U.S. National Indoor Tennis Championships in March, which was held at the Oklahoma Coliseum, after three-straight-set wins in the semifinal against Riggs and in the final against Wayne Sabin.

[39] In April, Kovacs won the River Oaks tournament in Houston beating Kramer in the semifinals[40] and Bitsy Grant in the final.

In August, Kovacs won the Eastern Grasscourt Championships at the Westchester Country Club in Rye, N.Y., defeating Schroeder, McNeill, and Sabin in three-straight-set matches.

Kovacs was runner-up in the U.S. National Championships at Forest Hills, beating Jack Kramer and Don McNeill before losing to top-seeded Bobby Riggs in a five-set final.

[45] Kovacs was also responsible for something of a scandal over money in tennis, which before the Open era was strictly divided into amateurs and professionals.

Though the tennis activity was very limited between 1943 and 1945 Kovacs defeated the players he was able to play against such as Welby Van Horn, Don McNeill, Adrian Quist, Bill Tilden, Jack Crawford, Jack Jossi, Martin Buxby, Joe Whalen, George Lott, George Lyttleton Rogers.

[54] YANK, The Army Weekly, stated that of the professional tennis players serving in uniform, "the best of them was Frank Kovacs".

On September 2, Kovacs won the decider of the U.S. Professional Challenge Tour over Riggs in three straight sets using "a devastating series of well-placed backhand shots and cannonball serves.

Kovacs won the North Florida Pro championships in St. Augustine in January beating Bill Lufler in the final.

[71] 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.

[75] Kovacs won the U. S. Pro Clay Court Championships in March over Van Horn in the final, displaying an agile change of pace.

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.

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).

[81] In March 1952, at age 32, Kovacs defeated Pancho Gonzales in the Philadelphia Masters indoor on wood, despite losing the first eight games of the match.

[84] An injured Kovacs won the U. S. Pro Clay Court Championships in January at Hollywood Beach, Fla. over Riggs in the final in three straight sets.

"Kovacs' power and accurate placements to the corners, plus a number of service aces, spelled the difference in the deciding set.

[87] In March, 1955 Kovacs defeated Nick Carter in a pro exhibition match in San Francisco in straight sets.

Kovacs did not play in the U.S. Clay Court Championships after 1938, or at Roland Garros or in Davis Cup, events where he would have been expected to achieve some success.

Kovacs won a head-to-head series on an indoor surface against Riggs, with both players reportedly in excellent form throughout the matches.

Fred Hawthorne, reporter for New York Herald-Tribune who watched nearly all the early matches of the 1941-1942 pro tour thought that Kovacs at his best reached "sheer brilliancy never before excelled", but at other times Frank played "surprisingly poor tennis."

[95] TennisBase states Kramer led 4-0 in their meetings as pros,[96] all four matches played in the Philadelphia indoor tournament on wood.

Kovacs was married to San Francisco vocal coach Judy Davis in 1950 and they lived for many years in their home in the Rockridge district of Oakland, until his death in 1990.

[97][98] His first marriage, on July 14, 1941, was to Virginia Wolfenden, also a tennis professional; they had a son, Frank Jr.[99] His cousin was the entertainer Ernie Kovacs.