DETROIT: Tesla sales fell sharply last quarter as competition increased worldwide, electric vehicle sales growth slowed, and price cuts failed to draw more buyers. The Austin, Texas, company said it delivered 386,810 vehicles from January through March, almost 9% below the 423,000 it sold in the same quarter of last year. Sales also fell short of Wall Street expectations. Analysts polled by FactSet expected Tesla Inc. to deliver 457,000 vehicles. The company blamed the decline in part on phasing...