Pathum Nissanka became the fourth Sri Lankan player to score a century on debut.
Here is a list of all Sri Lankan players to have scored a 50 or more on Test debut.

Note that several members of the current Sri Lankan team are in this list. Chandimal and Kusal (MDKJ) Perera had scored two fifties on debut, along with Hasuranga (PWH) de Silva, Karunaratne, Dickwella and Dilruwan (MDK) Perera.