Pool D had two 2-1 victories by Iowa State over UConn and Oregon over Dayton.
Pool E saw Air Force take the lead in the group with a 1-0 victory over Central Florida. California and Grand Valley State tied at 1.
Pool F had Rice begin group play with a 2-0 win over Villanova. James Madison and Minnesota played to a 1-1 draw.
Next games in the above pools will be at 4:45pm local time.
Watch @NIRSAchamp and #NIRSAsoccer on Twitter for score updates.
NOTE: For official results please visit: http://play.nirsa.net/soccer/national-championship-results/