Day 13 Favorite Tennis Moments

To help us pass some time this offseason, Midwest Sports is revealing 25 of our favorite moments in tennis history throughout the month of November.

Day 13: September 10, 1988: Steffi Graf becomes the only person (woman or man) to win a calendar year "Golden Slam"

Steffi Graf vs. Gabriela Sabatini

Steffi Graf defeats Gabriela Sabatini in the finals of the 1988 US Open. The win marked her 4th Grand Slam title in 1988. Graf became the only person (woman or man) to win the "Golden Slam" in a calendar year, thanks to her Olympic gold medal during the 1988 Summer Olympics in Seoul.