Everything is on the line in a sibling rivalry – especially when it comes to a head on an NBA court.

Fans at Chase Center on Monday night caught a quick glimpse of that, as Warriors guard Pat Spencer started to post up against his younger brother, Memphis Grizzlies Guard Cam Spencer in the closing seconds of the Warriors’ 131-118 win .

Steph Curry, recognizing the sibling matchup unfolding, jumped off the bench and went wild.

Curry, who also has matched up against his brother, Seth, in an NBA game , understood what was at stake.

Grizzlies guards Ja Morant and Kentavious Caldwell-Pope also were cheering on the matchup on the other side.

Pat was unable to convert the turnaround jump shot in the closing seconds. One could only imagine the bench reaction if that shot fell.

It’s not t

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