The left-hander - who hit an unbeaten hundred against Durham in the club's second Championship match of the summer - has over 10,000 first-class runs to his name
Sussex have announced that batsman Stiaan van Zyl has agreed a contract extension with the Hove club.
The left-hander - who hit an unbeaten hundred against Durham in the club's second Championship match - has scored 10,483 first-class runs in his career.
Van Zyl, who joined Sussex ahead of the 2017 season, said: "I am extremely grateful to sign an extension with Sussex.
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"Since starting in 2017, I’ve enjoyed every second at the club and with my teammates. I’m looking forward to many more games with this wonderful club."
Head coach, Jason Gillespie added: "We’re delighted that Stiaan has agreed to continue his career at the club. He’s a senior batsman of international quality who contributes significantly with his performances and he’s a great lad on top of that.
"We like to make sure our players are learning from each other and Stiaan sets a great example in terms of his approach to his preparation as well as how he goes about things out in the middle."