The Tigers (19-3, 5-3 Atlantic Coast Conference) had beaten No. 4 Duke 74-47 here Wednesday night and looked on the way to a similar blowout, leading 44-25 with 15 minutes to go. But the Seminoles (18-5, 5-3) gave Clemson something the Blue Devils couldn't--a second-half fight.
The Tigers were still ahead 57-42 on Trevor Booker's 3-pointer with 9 minutes left. However, Douglas brought Florida State back, scoring 12 points in a 23-4 run to the finish.
Solomon Alebi had 17 points, including a turnaround jumper with 2:03 left that put the Seminoles ahead for good.
Booker and Demontez Stitt had 11 points each to lead Clemson.