Defending NCAA champ Villanova holds off Saint Mary's

Villanova's Jermaine Samuels (23) screams after his dunk against St. Mary's Tommy Kuhse (12) and Malik Fitts (24) during the second half of a first round men's college basketball game in the NCAA Tournament, Thursday, March 21, 2019, in Hartford, Conn. (AP Photo/Elise Amendola)

St. Mary's Jordan Ford, left, and Tanner Krebs walk off the court together at the end of a first round men's college basketball game against Villanova in the NCAA tournament, Thursday, March 21, 2019, in Hartford, Conn. (AP Photo/Jessica Hill)

St. Mary's Tanner Krebs drives to the hoop against Villanova's Collin Gillespie (2) and Jermaine Samuels, left, during the first half of a first round men's college basketball game in the NCAA Tournament, Thursday, March 21, 2019, in Hartford, Conn. (AP Photo/Elise Amendola)

Villanova's Collin Gillespie (2) passes before falling out of bounds while St. Mary's Jordan Hunter (1) defends during the first half of a first round men's college basketball game in the NCAA tournament, Thursday, March 21, 2019, in Hartford, Conn. (AP Photo/Jessica Hill)

Villanova's Phil Booth (5) shoots over St. Mary's Tanner Krebs (0) during the first half of a first round men's college basketball game in the NCAA tournament, Thursday, March 21, 2019, in Hartford, Conn. (AP Photo/Jessica Hill)

Villanova's Eric Paschall, right, drives against St. Mary's Malik Fitts (24) during the second half of a first round men's college basketball game in the NCAA Tournament, Thursday, March 21, 2019, in Hartford, Conn. (AP Photo/Elise Amendola)

St. Mary's Malik Fitts (24) and Villanova's Eric Paschall (4) reach for the ball during the second half of a first round men's college basketball game in the NCAA tournament, Thursday, March 21, 2019, in Hartford, Conn. (AP Photo/Jessica Hill)

St. Mary's Dan Fotu (42) and Jordan Hunter (1) walk downcourt near the end of the second half of a first round men's college basketball game against Villanova in the NCAA Tournament, Thursday, March 21, 2019, in Hartford, Conn. (AP Photo/Elise Amendola)

Villanova's Phil Booth, right, drives on St. Mary's Tanner Krebs, left, during the second half of a first round men's college basketball game in the NCAA Tournament, Thursday, March 21, 2019, in Hartford, Conn. (AP Photo/Elise Amendola)

Villanova's Dhamir Cosby-Roundtree (21) reacts after dunking as St. Mary's Tanner Krebs (00) looks on during the second half of a first round men's college basketball game in the NCAA tournament, Thursday, March 21, 2019, in Hartford, Conn. (AP Photo/Jessica Hill)

Villanova's Jermaine Samuels (23) dunks against St. Mary's Malik Fitts (24) during the second half of a first round men's college basketball game in the NCAA Tournament, Thursday, March 21, 2019, in Hartford, Conn. (AP Photo/Elise Amendola)