Each day, some of our college hoops experts discuss the biggest issues, trends and themes in and around college basketball.

1. Three No. 2 seeds (Virginia, Kansas and Gonzaga) are in action Sunday. Which is most vulnerable?

Andy Katz: Tough call. All three could easily lose. Michigan State is playing its best basketball of the season, and Virginia has been letting teams hang around too late. If the Spartans can make perimeter shots like they did against Georgia, they have a real shot against the stingy Cavs.

C.L. Brown: Virginia. Not only have the Cavaliers lost two of their past four games, but they've also got the toughest opponent. No one would be surprised if Michigan State wins because that's what Tom Izzo does in March.

Myron Medcalf: I'd say Gonzaga. Iowa has been up and down all season. But the Hawkeyes finished strongly against the Big Ten's bottom half. If there were any doubts about the late-season Iowa Extreme Makeover, a 31-point win over Atlantic 10 regular-season champ Davidson in the opening round of the NCAA tournament probably squashed them. The Hawkeyes are big and fluid. Iowa could beat Gonzaga in front of a pro-Zags crowd in Seattle. The Hawkeyes are capable of that.

2. Dayton could find itself in consecutive Sweet 16s. Favorable path, or are the Flyers for real?

Katz: Columbus has been kind to Dayton, but its run might lose some steam against the Sooners, who I have coming out of the East.

Brown: There's no denying Dayton has had a favorable path playing both at home and in Columbus. But ultimately, buildings don't win games. If the Flyers win, they are very real because they're still playing in the Sweet 16.

Medcalf: Well, playing in Dayton and Columbus has certainly helped with fan support. But a 13-point victory over a good Providence team wasn't about the draw. It was about Archie Miller's molding a team that was once in turmoil into a possible Sweet 16 squad. The Flyers are legit.

3. Gonzaga hasn't been to the second weekend since 2009. What must Iowa do to keep that streak alive?

Katz: The Zags have more balance than Iowa. The Hawkeyes must force Gonzaga to be one-dimensional on offense.

Brown: Iowa will likely need double-figure scoring from an unlikely source to keep up with the Zags. Hello, Adam Woodbury? Perhaps Peter Jok can get hot from 3-point range? Someone outside the trio the Hawkeyes depend on most (Aaron White, Jarrod Uthoff and Mike Gesell) has to step forward.

Medcalf: Run Kyle Wiltjer off the 3-point line, and attack him when he's defending. That would be a good start. The Hawkeyes can't let him find room on the perimeter to just catch the ball and hit 3s all night. They have to find a way to limit his touches. Then they have to go at him and challenge him on the other end.

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Few teams have been able to match Jahlil Okafor and Duke's length, but San Diego State has length in its frontcourt. The question will be whether the Aztecs can score enough points. They rank 305th nationally in points per game (61.8).

Wichita State is looking to return to the Sweet 16 for the first time since its wild Final Four run in 2013, and many brackets have the Shockers beating the Jayhawks, as Kansas had some personnel issues to close the season. Although it hasn't always been pretty, Kansas has won five of its past seven games.

Iowa hasn't appeared in the Sweet 16 since 1999, and the Hawkeyes certainly looked the part Thursday in a blowout win over Davidson. They'll have to hope Gonzaga has a similarly cold (6-for-28) night from 3-point range.

West Virginia will unleash its pressing, up-tempo style on Maryland, which ranks 129th nationally in turnover percentage, according to Ken Pomeroy. The Terrapins turn it over on 18.4 percent of their possessions.

Cuz they went 34-0 lol RT @Fastdrawmcgraw: Why does Kentucky get to play in Kentucky?

— Jerian Grant (@ThatGrant22) March 21, 2015