Olympics fatigue may be starting to set in as Monday’s primetime action delivered the lowest ratings score of the London Games. Still, with about 26 million viewers, NBC crushed the competition, with Univision and its original novelas running a distant second.

According to preliminary Nielsen estimates, the Summer Olympics on NBC — which featured gymnastics, track and field, men’s diving and beach volleyball — averaged an 8.1 rating/22 share and 26.0 million viewers overall during primetime, with the evening’s final averages expected to be revised in the nationals depending on any atypical start or stop times. While NBC beat the other broadcast networks combined, the Monday numbers were the lowest yet for the London Games, down about 20% vs. the opening Monday a week earlier and also off some vs. the comparable night in Beijing four years ago.

Other than the Olympics, Univision claimed the night’s top programs among young adults with ”La Que No Podia Amar” (1.7/5 in 18-49, 4.5 million viewers overall), ”Abismo de Pasion” (1.5/4 in 18-49, 3.8 million viewers overall) and ”Por Ella Soy Eva” (1.3/4 in 18-49, 3.1 million viewers overall).

CBS’ all-repeat lineup started with ”How I Met Your Mother” (1.0/3 in 18-49, 3.3 million viewers overall) and ”2 Broke Girls” (1.0/3 in 18-49, 3.6 million viewers overall), followed by the debut of ”Broke” in its new 9 p.m. timeslot (1.2/3 in 18-49, 3.9 million viewers overall). Encores of ”Mike and Molly” (1.1/3 in 18-49, 3.8 million viewers overall) and ”Hawaii Five-0” (0.8/2 in 18-49, 3.6 million viewers overall) closed things out.

ABC aired its low-rated firstrun combo of ”Bachelor Pad” (1.0/3 in 18-49, 3.4 million viewers overall) and ”The Glass House” (0.6/2 in 18-49, 1.6 million viewers overall), and Fox aired repeats of ”Hell’s Kitchen” that averaged a 1.1/3 in 18-49 and 2.7 million viewers overall.

Preliminary 18-49 averages for the night: NBC, 8.1/22; Univision, 1.5/4; Fox, 1.1/3; CBS, 1.0/3; ABC, 0.9/2; CW, 0.2/1;

In total viewers: NBC, 26.0 million; Univision, 3.8 million; CBS, 3.6 million; ABC, 2.8 million; Fox, 2.7 million; CW, 0.6 million.