Sorting by Multiple Fields in Reports

Is there a way to sort by multiple columns when creating a Row & Column Report?

For example, we would like to sort a Row & Column report of our open Opportunities by

1) Account Name (alphabetically) and

2) Opportunity Name (also alphabetically)

so that our Opportunities are grouped first by Account but also by name. From what I've been able to find I can only sort by one column at a time; is there any way around this?