Shai Gilgeous-Alexander and Nickeil Alexander-Walker are reliving childhood as cousins face off in NBA playoffs.

Across the six seasons Alexander-Walker has been in the NBA, he has spent a total of 28 minutes and 17 seconds as the primary defender on Gilgeous-Alexander, according to the league's tracking data.

Here are five fast facts about how Shai Gilgeous-Alexander and Nickeil Alexander-Walker are related, ahead of their Conference Finals matchup ...

Cousins Shai Gilgeous-Alexander and Nickeil Alexander-Walker have faced each other 15 times now in the NBA — including once in a play-in game — but never in a playoff series.

While Shai Gilgeous-Alexander, right, has gone on to become NBA MVP with the Thunder, Nickeil Alexander-Walker, left, has solidified himself as a reliable three-and-D winger with the Timberwolves.

There will be no love lost between cousins Nickeil Alexander-Walker and Shai Gilgeous-Alexander in the Western Conference Finals.

Game 1 is Tuesday night in Oklahoma City. More importantly, for Gilgeous-Alexander specifically, his cousin Nickeil Alexander-Walker is a key, court-tilting role player for Minnesota. That's right.

Shai Gilgeous-Alexander, the NBA MVP, is playing his cousin Nickeil Alexander-Walker in the NBA Western Conference Finals The cousins grew up together in Hamilton, Ontario Shai and Nickeil once ...

Shai Gilgeous-Alexander has a cousin on the Timberwolves, and he expressed excitement about their impending Western Conference finals meeting.

Cousins Shai Gilgeous-Alexander and Nickeil Alexander-Walker have faced each other 15 times now in the NBA — including once in a play-in game — but never in a playoff series.

Gilgeous-Alexander and Walker-Alexander are first cousins (Shai's father and Nickeil's mother are siblings); they're practically brothers according to Shai.

The Western Conference Finals have a different meaning for Shai Gilgeous-Alexander and Nickeil Walker-Alexander.