As Procter & Gamble finds its footing, its chief rival is starting to struggle. Unilever Chief Executive Officer Paul Polman will next week report one of the worst quarters of sales growth in his five-year tenure amid a slowdown in emerging markets. At the same time,  an expected recovery in the US, the company's largest market, has failed to materialize. Unilever, the world’s second-largest consumer goods maker, announced on Sept. 30 that it will post underlying sales growth of 3-3.5%...