The Miami Herald (Michael Wallace) reports: New Heat coach Erik Spoelstra has visions of running an up-tempo, slashing, dunking offense that takes advantage of an athletic nucleus anchored by guard Dwyane Wade. But it’s going to require a gear Wade had been unable to reach the past two seasons. Wade began his latest — and what he hopes to be his last — rehabilitation on his troublesome left knee Monday in his hometown of Chicago, where he is working with Michael Jordan’s former trainer, Tim Grover. It is the latest step Wade has taken in an attempt to put two injury-plagued seasons behind and regain his more-explosive form from the Heat’s 2006 championship season, when Wade was named MVP of the NBA Finals.