PHILADELPHIA >> Al Horford had no use for the premature celebration that showered confetti all over the 76ers' home court at the end of regulation, delaying overtime and prompting an impromptu cleanup job.Turns out, Horford has the Celtics just a game away from a real sweep.Horford scored the go-ahead basket for Boston late in overtime in a wild Game 3 where the Philadelphia 76ers were sloppy with the basketball and the confetti, leading the Celtics to a 101-98 victory and a 3-0 series lead on Saturday night.