GAINESVILLE, Fla. - A long line of cars and trucks collided one after another early Sunday on a dark Florida highway so shrouded in haze and smoke that drivers were virtually blinded.

Authorities were still trying to determine what caused the pileup south of Gainsville on Interstate 75, which had been closed for a time because of the mixture of fog and heavy smoke from a brush fire.

Donna Henry was driving south at 3:45 a.m. when she encountered the dense smoke.

MELBOURNE, Australia - Novak Djokovic wore down Rafael Nadal in the longest Grand Slam singles final ever, winning 5-7, 6-4, 6-2, 6-7 (5), 7-5 after 5 hours, 53 minutes to claim his third Australian Open title.

Minutes earlier, at 4-4 in an electrifying fifth set, an exhausted Djokovic collapsed with his arms and legs spread wide after losing a 31-shot rally - the longest of the match.

The 24-year-old Djokovic tore off his shirt in celebration.