Stumped on choosing a winner in Thursday or Friday's first round NCAA Tournament games? Let Las Vegas oddsmakers be your tiebreaker. 

Often times linemakers know more about an NCAA Tournament matchup than those on the Selection Committee. The smaller the spread number the more likely a chance of an upset. A popular upset pick this time around, Loyola-Chicago is just a three-point underdog to Miami, signaling a possible upset. 

Similarly, No. 12 seed New Mexico State is just a four-point underdog to Clemson and that number could drop closer to Friday's tip (9:57 p.m. ET). See below for the betting lines of each opening round games. 

Related: Updated odds to win NCAA Tournament

NCAA Tournament odds: First-round betting lines

Thursday, March 15
Oklahoma vs. Rhode Island (-1.5)
Wright State vs. Tennessee (-13.5)
UNC Greensboro vs. Gonzaga (-12.5)
Penn vs. Kansas (-14.5)
Iona vs. Duke (-20)
Loyola Chicago vs. Miami (-3)
South Dakota State vs. Ohio State (-7)
NC State vs. Seton Hall (-2)
Davidson vs. Kentucky (-7)
San Diego State vs. Houston (-3)
Stephen F. Austin vs. Texas Tech (-11)
Alabama vs. Virginia Tech (-2)
Buffalo vs. Arizona (-9)
Montana vs. Michigan (-12)
Friday, March 16
Providence vs. Texas A&M (-3)
CS Fullerton vs. Purdue (-21)
Marshall vs. Wichita State (-12.5)
Georgia Stage vs. Cincinnati (-16.5)
Lipscomb vs. North Carolina (-18)
Butler vs. Arkansas (-1)
Murray State vs. West Virginia (-9)
Texas vs. Nevada (-1)
Kansas State vs. Creighton (-2)
Bucknell vs. Michigan State (-13.5)
College of Charleston vs. Auburn (-11)
UMBC vs. Virginia (-22.5)
Florida State vs. Missouri (-1.5)
New Mexico State vs. Clemson (-4)

Villanova, Xavier, Florida, TCU matchups to be added.  

This article will be updated.