Alvaro Folgueiras sinks a go-ahead 3-pointer in the final seconds as Iowa takes down the defending champions. (0:47) TAMPA, Fla. -- Alvaro Folgueiras told Bennett Stirtz he'd be ready for the ball, and he delivered in the clutch. Folgueiras nailed a 3-pointer with 4.5 seconds remaining and Iowa eliminated defending national champion Florida, sending the top-seeded Gators home with a 73-72 victory on Sunday in the second round of the men's NCAA tournament. Under first-year coach Ben McCollum, the Hawkeyes reached the Sweet 16 for the first time since 1999, while Florida (27-8) became the first No. 1 seed to be knocked out of this year's March Madness. "This is really special," Folgueiras said. "March is for the dreamers and there's no better dreamer than us. It's incredible. We have to keep going. We are one of the 16 best teams in the country. We're still hungry." Iowa (23-12) wasted a 12-point lead in the second half but rallied in the final minutes, becoming the first No. 9 seed to beat a No.…