Duke remains No. 1 in AP Top 25 poll; Kentucky rises to 13th

File- This Dec. 20, 2018, file photo shows Duke forward Zion Williamson (1) dunking the ball against Texas Tech during the first half of an NCAA college basketball game in New York. Williamson is one of the names you may not know now but very well could by the end of 2019. They figure to come up big in the new year.(AP Photo/Adam Hunger, File)

RALEIGH, N.C. — After a light Christmas week schedule, top-ranked Duke and everyone else at the top of the AP Top 25 stayed put in a poll with few major changes.