Iga Natalia Świątek is a Polish professional tennis player. She is currently ranked as the world No. 1 in women's singles by the Women's Tennis Association (WTA), having held the position for a total of 102 weeks. Świątek is a four-time major singles champion, having won the French Open in 2020, 2022, and 2023 and the US Open in 2022. She is the first player representing Poland to win a major singles title. She has won a total of 20 singles titles, including the 2023 WTA Finals and nine WTA 1000 titles.

The Grand Slam in tennis is the achievement of winning all four major championships in one discipline in a calendar year. In doubles, a Grand Slam may be achieved as a team or as an individual with different partners. Winning all four major championships consecutively but not within the same calendar year is referred to as a "non-calendar-year Grand Slam", while winning the four majors at any point during the course of a career is known as a "Career Grand Slam".