When they meet Sunday in Oakland, the Golden State Warriors and Philadelphia 76ers will participate in not just the league's most monumental mismatch this season. The 76ers, though, gave Golden State all they could handle earlier this season and will try to pull off a most unlikely upset and end the Warriors' NBA-record regular-season home win streak. Golden State (65-7) moved 56 1/2 games ahead of Philadelphia (9-64) following the 76ers' 108-105 defeat in Portland on Saturday.