Whether they will be enough to close the gap on Tesco, however, is the great unanswered question. The quick answer? It seems unlikely. A £2bn profit makes Tesco look almost unassailable. Much, much more work is needed if Sainsbury is to achieve comparable margins or growth prospects. Analysts have increasingly begun to see the supermarket retailing sector as a one-horse race ? only two if you factor in Asda/WalMart's combined buying power and long-term potential.