Wendy's

(WEN) - Get Report

said its same-store sales rose 2.5% in June and 3.6% in July, and it expects the numbers to be even stronger in August.

The burger-and-fries seller attributed the rise in sales to its new line of deli sandwiches called the Frescata, which it introduced in April.

"Customers are loving the new Frescata line and this is being reflected in our bottom line," said Ian Rowden, Wendy's executive vice president and chief marketing officer, in a statement.

Based on the promising reaction to the Frescata, Wendy's is getting ready to introduce the Frescata Italiana, a new sandwich, in September, the company said.

Wendy's is the third-largest hamburger chain in the world, trailing

McDonald's

(MCD) - Get Report

and

Burger King

(BKC)

.

Shares of Wendy's rose 99 cents, or 1.6%, to $62.69 on the

New York Stock Exchange

.