Coach Billy Donovan's Florida Gators have six wins by 30 points or more in the SEC, and nine overall this season.

But with postseason tournaments on the horizon, winning close games against closely matched competition is a looming concern for the No. 5 Gators.

Tuesday night's 63-60 loss at Missouri dropped Florida (21-4, 11-2 SEC) to 0-3 in games decided by six points or fewer this season and was the Gators' eighth straight loss in games decided by fewer than 10 points.

Florida held double-digit leads in both halves Tuesday night, but relied too much on the 3-pointer and was outhustled and outmuscled on the backboard by the Tigers (19-7, 8-5).

Missouri senior forward Laurence Bowers, who did not play during Missouri's 83-52 loss on Jan. 19 in Gainesville, led the Tigers with 17 points and 10 rebounds. Point guard Phil Pressey had 10 assists, the same number of turnovers he had in the O'Connell Center.

Bowers hit a jump shot off a Pressey dish with 1:19 remaining to make the score 61-60. Bowers' shot followed a clutch 3-pointer by Florida point guard Scottie Wilbekin.

In the end, though, the 3-point line did in the Gators, who were 5 1/2-point favorites on the Tigers' homecourt.

Senior guard Kenny Boynton, the school's all-time leading 3-point shooter, missed twice beyond the arc in the final minute as Missouri pulled away to remain unbeaten at home this season.

Per the Gainesville Sun's Kevin Brockway (@gatorhoops), Boynton's long 3-pointer with nine seconds remaining was not the shot Donovan wanted. Donovan said he wanted something closer to the basket.

But the Gators rarely went inside all night and ended the night with 33 3-point attempts out of 54 shots.

The Gators were outrebounded by 11 boards (35-24) and also shot just 6 of 12 from the free-throw line. Florida entered the game shooting 66.9 percent from the line in SEC play, one of the few areas in which the Gators have not exceled this season.

On Tuesday night, the Gators also did not look like the SEC's top defensive team down the stretch and were outscored 27-11 after leading 49-36 with 10:54 remaining.

Five Gators average double figures this season, but just three scored 10 points or more against the Tigers.

Senior guard Mike Rosario led the way with 14 points, followed by Boynton with 11 and freshman Michael Frazier with 10. Rosario was just 3 of 8 from 3-point range, including a miss that would have tied the game at the buzzer.

Boynton and senior forward Erik Murphy (eight points) were just 2 of 9 from beyond the arc as the Gators lived and died by the 3.

The loss marks the third time the Gators have moved into the top-5 this season and quickly lost.

Florida now cannot afford another misstep if it hopes to secure a top seed for the NCAA Tournament.

The Gators return home this weekend loooking to get back on track against Arkansas at 7 p.m. Saturday. The Razorbacks beat Florida 80-69 at home on Feb. 5, but are 1-6 on the road this season.

Email Edgar Thompson at egthompson@orlandosentinel.com. Read the Swamp Things blog at www.orlandosentinel.com/swampthings. Follow our UF coverage on Twitter @osgators.