The No. 18 Razorbacks (23-5, 12-3 Southeastern Conference) enter the game on a pair of winning streaks, seven straight this season and three in a row over the Wildcats (28-0, 15-0).
That includes a pair of wins last season by Arkansas, which has won 10 of 11 games overall and hopes to do much more than play the underdog role in the SEC's most marquee matchup of the season.
Arkansas is led by Portis, the sophomore who is second in the SEC with an average of 17.6 points per game.
Kentucky's 28-game winning streak is the second-longest in school history, trailing only a 32-game stretch from 1953-55. It's also the longest in a single season for the Wildcats, who haven't faced a ranked opponent since a 58-50 win over Louisville on Dec. 27.
