Juzang gave Harvard a 61-57 lead with 3:27 remaining, and Princeton's Richmond Aririguzoh was fouled in the lane before going 1 of 2 at the stripe with 46.8 seconds to cap the scoring.
Jaelin Llewellyn appeared to have an opening for a go-ahead layup in the closing seconds, but Forbes blocked it.
Robert Baker had 10 points and three blocks for Harvard (17-7, 6-3 Ivy League).
Llewellyn had 22 points and eight rebounds for the Tigers (11-11, 6-3). Drew Friberg and Aririguzoh each had 11 points.
The Crimson evened the season series against the Tigers. Princeton defeated Harvard 70-69 on Feb. 1. Harvard takes on Penn at home on Saturday. Princeton plays Dartmouth on the road on Saturday.
For more AP college basketball coverage: https://apnews.com/Collegebasketball and http://twitter.com/AP-Top25
Elements of this story were generated by Automated Insights, http://www.automatedinsights.com/ap, using data from STATS LLC, https://www.stats.com
Michigan State beats No. 2 Michigan 70-64, boosts NCAA hopes
— Rocket Watts scored 21 points and Aaron Henry had 18 to lead Michigan State to a 70-64 victory over No. 2 Michigan on Sunday that seems to seal coach Tom Izzo's 23rd consecutive NCAA Tournament bid.
Langford drills clutch 3 as MSU takes down Michigan
Joshua Langford hits a 3-pointer in the final minute as Michigan State bolsters its NCAA tournament résumé with a win over No. 2 Michigan.
Teague 35 points as No. 3 Baylor beats No. 18 Texas Tech
— MaCio Teague scored 35 points while matching a school record with 10 made 3-pointers and No. 3 Baylor finished undefeated at home for the first time in 73 years with a 88-73 win over No. 18 Texas Tech in a regular-season finale Sunday.