In the first 100 years of the Australian Tennis Open, who was both the youngest and the oldest winner?

Ken Rosewall- Ken Rosewall is known for being the youngest Australian Open winner and also the oldest winner the tournament. Rosewall won the Australian Open in the year 1953 when he was 19 years and 76 days old. His last Australian Open title came in the year 1972 when he was 38 years old. He is the record holder for the highest number of years between his first and last Grand Slam victories. He has won 8 Grand Slams (singles) and 11 Grand Slams (doubles) in a glittering career while helping Australia emerge victorious four times in the Davis Cup as well.