MIAMI — The Heat will be seeing a lot of the same faces this week. Miami (12-10) plays back-to-back games against Charlotte (7-13) on the road on Monday and at home Wednesday before hosting Chicago (9-14) in back-to-back games on Thursday and Saturday. Although both teams they face this week have sub-.500 records, beating teams twice in three days is a difficult task, reminiscent of the Heat’s playoff duels against top opponents. “It’s a tough league regardless of who you’re playing back to back,” forward Caleb Martin said.