Still, there are real questions about how Porzingis and Hernangomez will fare together on the court despite their abilities. Although the most valuable player in the N.B.A. finals was Kevin Durant, an extremely athletic and versatile 7-footer with, among other things, a deadly perimeter game, the N.B.A. is no longer a league dominated by big men, especially two of them in the same starting lineup.

Quickness can be an issue when big men are together. So can defense in a league that now emphasizes three-point shooting. In the 558 minutes that Porzingis and Hernangomez shared the floor this past season, the Knicks allowed 107.8 points per 100 possessions, which is not good. Porzingis sometimes struggled when guarding smaller, faster forwards. Hernangomez had his defensive issues, too.

There are other issues to consider as well: the continued presence of another big man, Joakim Noah, whose initial season in New York was derailed by injuries and a doping suspension but who still has a long-term contract with the Knicks; Jackson’s loyalty to the triangle offense; and the possibility that Porzingis could end up at center, not forward, with Hernangomez perhaps coming off the bench.

Porzingis has said he intends to stay in Latvia for much of the summer and play for the national team in the European championships. He hopes to beef up, too. The Knicks have sought to make him stronger, in part to give him more opportunities to score closer to the basket.

And eventually, Porzingis and Hernangomez will be together again in training camp for the 2017-18 season. They befriended each other in their first week as teammates in Spain, and their families have also grown close. Porzingis helped Hernangomez settle in in Spain, having arrived there first and inviting him over to his apartment, where Porzingis’s mother cooked dinner for everyone.

And Janis Porzingis, Kristaps’s brother, is an agent at ASM Sports, the group that represents both Porzingis and Hernangomez.