He was the World No. 1 player for 2 years in the early 1960s and was the runner-up for another 7 years, he features on the "Legends Of Australia" postcard.

Ken Rosewall was born into a family that played tennis and owned tennis courts. A natural left-hander, he was taught by his father to play right-handed. Perhaps as a result of this unorthodox training (or in spite of it), he developed a powerful and very effective backhand but never had anything more than an accurate but relatively soft serve. He was small (only 5 ft 7 in (1.70 m) and 135 pounds) and was called "Muscles" by his fellow-players because of his lack of them. He was, however, fast, agile, and tireless, with a deadly volley. His sliced backhand was his strongest shot, and, along with the very different backhand of the earlier player Don Budge, has generally been considered one of the two best backhands of all time.

He was only 18 years old when he won the Australian Championships and French Championships men's singles title. In 1956, partnered with Lew Hoad, he won the doubles Grand Slam in tennis, taking all four major championships that year. For several years in their youthful careers Rosewall and Hoad were known as "The Gold-dust Twins."

Rosewall turned professional in 1956 after his surprise victory over Hoad in the United States Championships at Forest Hills, thereby depriving Hoad of winning the Grand Slam. Signed by promoter and former tennis great Jack Kramer, Rosewall played a series of head-to-head matches against the reigning king of professional tennis, Pancho Gonzales, and was badly beaten, 51 matches to 26.

In his 1979 autobiography, Kramer writes that "Rosewall was a backcourt player when he came into the pros, but he learned very quickly how to play the net. Eventually, for that matter, he became a master of it, as much out of physical preservation as for any other reason. I guarantee you that Kenny wouldn't have lasted into his forties as a world-class player if he hadn't learned to serve and volley."

In 1962 and 1963, with Gonzales in semi-retirement, and Rod Laver a newly fledged pro not yet at the height of his career, Rosewall was clearly the best player in the world on a day-to-day basis. Kramer includes Rosewall in his list of the 21 greatest players of all time.[1]

During his long playing career he remained virtually injury-free, something that helped him to still win tournaments at the age of 43 and remain ranked in the top 15 in the world. Although he was a finalist 4 times at Wimbledon, it was the one major tournament that eluded him.

Rosewall was a finalist at the 1974 U.S. Open at 39 years 310 days old, making him the oldest player to participate in a Grand Slam finals.

In 1995 Gonzales said of him: "He became better as he got older, more of a complete player. With the exception of me and Frank Sedgman, he could handle everybody else. Just the way he played, he got under Hoad's skin, but he had a forehand weakness and a serve weakness." In his extremely long career, Rosewall played 111 matchs against Rod Laver, winning 49 while losing 62. In 160 matchs against Pancho Gonzales he won 59 and lost 101. In 70 matchs against Lew Hoad he won 45 and lost 25.

Rosewall was also known as being extremely careful about his spending, like a number of other Australian players of the time. The Australians themselves characterized this as having "short arms and deep pockets." Kramer writes that an Australian radio reporter once asked Pancho Segura what his single biggest thrill in tennis had been. "'The night Frank Sedgman bought dinner,' Segoo replied."

A grandfather of five, Rosewall now lives in Northern Sydney, where he still plays an occasional game of tennis.

Rosewall was inducted into the International Tennis Hall of Fame in Newport, Rhode Island, in 1980.