11:34 AM ET 08.11 | He may have four Sprint Cup titles under his belt, but Jimmie Johnson's recent slump doesn't sit well with the defending champion. "We're optimistic," he said. "We know we need to be finishing better than we are right now, but again the Chase isn't here yet and we've been in this position before late in the regular season ... For whatever reason, when the Chase comes around we typically get our act together and perform. I'm really hoping for that again." Johnson has little to worry about in making the Chase, sitting fifth in points, but could face stiff competition from Earnhardt Ganassi and Roush Fenway drivers.