Two of the big four broadcast networks are in a dead heat as the race to finish on top in the summer ratings comes down to the wire.

Media Life reports that ABC and NBC are tied in the key demo of adults 18-49. ABC was the early leader in the summer season, but has seen its sizable margin chipped away by NBC in July and August.

With three full weeks left in the season, both networks are averaging a 1.4 demo rating, based on Nielsen data through Aug. 23. That’s exactly where they found themselves at this point one year ago — tied at 1.4.

“The other two Big Four networks have suffered slight declines this summer,” Media Life notes. “Fox is No. 3 with a 1.1 rating, down a tenth from a 1.2 last year. And CBS is fourth with a 1.0, down a tenth from a 1.1.”

Combined, the big four networks are down 4% from where they were at this time a year ago.

ABC got off to a good start with a record performance for the network by the NBA Finals along with a 13% rise for “The Bachelorette,” which delivered a 2.0.

NBC, however, is positioned to win the summer. Its top performer has been “America’s Got Talent,” but the difference maker will likely be the return of the NFL in two weeks.