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Tournament Challenge: MSU, L'ville gaining

As of 5:45 p.m. ET Wednesday, there were 7.55 million brackets entered in ESPN's Tournament Challenge. Last year, there were 8.14 million brackets entered. Note that you can sign up until tipoff of the first game Thursday. Tournament Challenge users don't pick the First Four games.

Florida is still the top pick overall to win it all at 27.4 percent of brackets, but Michigan State and Louisville keep gaining ground.

Top 10 picks to win it all:

1. Florida: 27.4 percent

2. Michigan State: 14.1 percent

3. Louisville: 9.3 percent

4. Arizona: 7.7 percent

5. Wichita State: 6.0 percent

6. Kansas: 5.5 percent

7. Duke: 5.5 percent

8. Virginia: 3.8 percent

9. Michigan: 3.7 percent

10. Syracuse: 3.6 percent

Here's how President Obama's bracket measures up to the rest of those entered:

  • 14.1 percent of brackets also have Michigan State winning it all

  • 7.9 percent of brackets also have Michigan State-Louisville in title game

  • 9.5 percent of brackets also have his Final Four of Arizona, Florida, Louisville, Michigan State

The most popular Final Four combination is Arizona, Florida, Louisville and Michigan State at 9.5 percent. Conversely, just 3.4 percent of brackets took all four No. 1 seeds to reach the Final Four.

The most picked final game so far is Florida and Louisville in 13.1 percent of all brackets. The Gators are picked to reach the final game in 41.6 percent of brackets, with Louisville at 27.9 percent.

Top final game combinations:

Florida-Louisville: 13.1 percent

Florida-Arizona: 8.9 percent

Louisville-Michigan State: 7.9 percent

Florida-Duke: 5.5 percent

Florida-Wichita State: 5.3 percent

Arizona-Michigan State: 4.4 percent

Duke-Michigan State: 2.6 percent

Percentage of brackets picking teams to reach the Final Four, by region:

South

1. Florida: 62 percent

2. Kansas: 16.8 percent

3. Syracuse: 11.8 percent

4. UCLA: 2.9 percent

West

1. Arizona: 48.2 percent

2. Wisconsin: 20.7 percent

3. Creighton: 12.5 percent

9. Oklahoma State: 5.9 percent

Midwest

4. Louisville: 38.3 percent

3. Duke: 21.3 percent

1. Wichita State: 18.2 percent

2. Michigan: 15 percent

East

4. Michigan State: 46.3 percent

1. Virginia: 22.6 percent

2. Iowa State: 11.8 percent

3. Villanova: 9.4 percent

Other notable teams with significant Final Four support:

9-seed Oklahoma State: 5.9 percent

6-seed North Carolina: 4.4 percent

8-seed Kentucky: 3.4 percent

Upset Watch

9-seeds Pittsburgh (71.6 percent) and Oklahoma State (65.9 percent) are both picked to win their round of 64 games. No other lower seeds are taken in a majority of brackets.

Most popular upsets by seed:

10 over 7: Arizona State (39.7 percent) over Texas

11 over 6: Iowa/Tennessee winner (42.1 percent) over UMass

12 over 5: NC State (36.8 percent) over Saint Louis

13 over 4: New Mexico State (10.8 percent) over San Diego State

14 over 3: Louisiana-Lafayette (5.7 percent) over Creighton

15 over 2: Milwaukee (3.5 percent) over Villanova

16 over 1: Coastal Carolina (1.9 percent) over Virginia

Other 12-5 upsets:

Harvard (30.6 percent) over Cincinnati

North Dakota State (22.5 percent) over Oklahoma

Stephen F. Austin (20.7 percent) over VCU

Least popular picks to win it all:

New Mexico State: 1,369 total brackets

NC Central: 1,395

Manhattan: 1,676

Tulsa: 1,766