Tessa ter Sluis (born 16 January 1995 in Sint Willebrord) is a Dutch professional squash player.

ter Sluis went to RSG t' Rijks to get her VWO high school diploma.

Whilst she started playing on the PSA World Tour in 2014, she decided to study for a few more years.

She studied Sportmarketing at the Johan Cruyff University, a hbo programme set up for athletes.

ter Sluis is currently sponsored by multiple companies, such as VitOrtho voedingssupplementen, BRESS breda, Houtrust Squash and Decathlon Nederland.