Jeff Froccaro and Tom Schreiber were held scoreless Saturday at the Konica Minolta Face-Off Classic in Baltimore.
Three days later, things changed.
The win ended a two-game losing streak for the Tigers (3-2).
Villanova, which rallied from a late three-goal deficit Saturday to beat Penn with a goal on a desperation, last-second shot from 25 yards, fell to 4-2.
Princeton was playing for the first time since its 9-8 loss to No. 12 North Carolina in the Classic, a game in which the Tigers outshot the Tar Heels 43-22.
Froccaro had two assists for a career-best seven points, and Schreiber had one assist.
No. 15 Fairfield 15, Lafayette 9: Eric Warden had three goals to lead 10 Stags in scoring. Fairfield (7-0) held the Leopards (2-4) to one goal in the first quarter.
Notre Dame becomes just the third Irish team to open the year with five straight wins, joining the 2004 and 2006 squads. Both teams qualified for the NCAAs, with the 2006 team advancing to the national semifinals. The Bulldogs fell to 2-2.
No. 16 Cornell 21, Canisius 7: Jessi Steinberg scored five goals and the host Big Red (5-0) eclipsed the 20-goal mark for the first time in nearly two decades.
Cornell had 11 different scorers, and all three of its goalies earned saves against the Golden Griffins (2-4).
No. 18 Massachusetts 19, American 11: Three Minutewomen had hat tricks in Massachusetts' seventh straight victory.
The host Minutewomen (7-0) are off to their best start since 1982, when they finished the season with a 10-0 record and won the NCAA championship.
Washington College 13, Catholic 6: Bennett Cord scored a career-high five goals and assisted on another to power the host Shoremen (3-2) past the Cardinals (6-2).
Washington College got the final seven goals of the game to pull away.
No. 6 Maryland 18, Richmond 9: Brooke Griffin scored four goals, Katie Schwartzmann (Century) added a hat trick and seven other players scored to pace the host Terps (6-2) to their highest goal output since Feb. 16. Karri Ellen Johnson (Broadneck) became the third player in school history to record 200 career goals with two against the Spiders (3-4).