Missouri began against Nevada on Friday where it left off against Northwestern on Thursday.
The Tigers (7-0) scored 44 points in both the first half against the Wildcats and second against the Wolf Pack and in the remaining periods of the Las Vegas Invitational, played even with competition.
Their 18-point lead at the half with Nevada was narrowed down twice to five in the second, but the Tigers stayed alive and clawed out an 83-70 win.
Missouri is guaranteed a share of the tournament championship with a perfect record through round-robin play. It can win the de facto title with a home win against UCLA, also undefeated in the tournament, on Dec. 7.
Senior guard Earnest Ross scored a Missouri career-high 28 points in the win on 7-14 shooting. Junior guards Jabari Brown and Jordan Clarkson combined for 45 more points.
No other Tigers scored in double figures.
Forwards Ryan Rosburg and Johnathan Williams III had 14 point each Thursday, but combined for four points Friday. Williams, a freshman, was without a basket for the first time in his college career and only played 18 minutes.