How much harder is OKC's path to a title?

Russell Westbrook is expected to miss the first 4-6 weeks of the regular season after undergoing arthroscopic surgery on his right knee due to swelling caused by a loose stitch. For a team like OKC that many NBA experts already feel could be a notch down this season after losing Kevin Martin over the summer, this could be a devastating blow to their chances of a title run in 2013-14.