The youngest player to win a Grand Slam title in tennis is Martina Hingis. She achieved this milestone at the age of 16 years and 117 days when she won the Australian Open in 1997. Hingis showcased remarkable talent and maturity on the court, securing her place in tennis history. Her victory marked a significant moment both for her career and for women's tennis, demonstrating that young players could compete successfully against seasoned professionals. Hingis went on to have a stellar career, winning multiple Grand Slam titles and solidifying her status as one of the sport's greats.