The playoff-hopeful Charlotte Hornets tip off about as tough of a back-to-back as the NBA schedule has to offer just when they need it least Sunday night when they face the Golden State Warriors in Oakland, Calif. The Hornets (35-40) need all the wins they can get in their final seven games as they seek to move up from 10th place in their battle with Detroit, Brooklyn, Miami and Orlando for the final three spots in the Eastern Conference playoff race. Charlotte put itself in an improved position when it won three in a row on the eve of a four-game Western swing, but then suffered a critical 129-115 loss against the Los Angeles Lakers on Friday night.