Villanova’s Mikal Bridges and Alabama’s Collin Sexton crossed paths one last time late in their NCAA tournament matchup Saturday, and they briefly made eye contact as Sexton hurled a profanity at Bridges following a dunk.It could have been a volcanic moment, but instead it was emblematic of what had transpired throughout the Wildcats’ 81-58 win in a second-round East Region game at PPG Paints Arena.Just as he had done after a putrid first-half showing, Bridges opted not to get emotional — he kept his head down as an official called Sexton for a technical foul — and he a calmly watched as teammate Jalen Brunson knocked down a pair of free throws.The lead at that point was 26, largely because Bridges had scored 22 of his 23 points in the first 12 minutes of the second half, and largely because Sexton had been flustered all afternoon.The Crimson Tide’s dynamo had carried his team here with a string of brilliant March performances and solidified his place as a probable lottery pick in June’s NBA draft, but his college career likely ended with two hours of sheer frustration.He finished with 17 points on 14 shots, with three assists against five turnovers, and was no match against a Villanova team that overcame early foul trouble and hit 17 three-pointers to reach the Sweet 16 .The top-seeded Wildcats will play No.5 West Virginia or No.13 Marshall on Friday in Boston.“Seventeen threes.Some nights, we’re going to have them.Some nights we’re going to have to sleep in the streets and we’re going to have to do it with our defensive rebounding,” Villanova Coach Jay Wright said.The Wildcats (32-4) are so dangerous this month because they can win in a variety of ways.Saturday’s path was less than ideal: for a while in the bipolar performance, it appeared as if Villanova might not get out of the first weekend of the tournament for the fifth time in six years .Villanova’s cast of starters could not have looked more out of sorts on offense than in the first 20 minutes.Brunson and freshman big man Omari Spellman sat for 10 minutes with two fouls apiece.Juniors Phil Booth and Eric Paschall combined to go 0 for 4 from the field.And Bridges, a junior who, like Sexton, projects as a probable lottery pick in June’s 2018 NBA draft, started 0 for 5 and grew frustrated after missing a free throw and a layup in transition late in the first half.But among the similarities between this Villanova team and the national-championship-winning edition in 2016 is depth and player development.The 2016 team had a redheaded freshman guard, Donte DiVincenzo, who ran the scout team and emulated the opposing team’s top scorer — for example, he played the role of Oklahoma’s star guard Buddy Hield at Final Four practices, which helped the Wildcats destroy the Sooners in the national semifinals.But he rarely played in games.Two years later, DiVincenzo is the top sixth man in the Big East and knows how to get his team out of a pinch.His objective Saturday was simple.He wanted to defend and