One time period is shaping up as a key battleground for the fall season, with three networks set to face off with important single-camera comedy hours, Deadline.com reports.

With the schedules announced this week for ABC, NBC and Fox, all three networks are putting up high-stakes sitcom programming on Tuesdays from 9-10 p.m. ABC wants to establish a comedy beachhead in the hour with “Happy Endings” and “Don’t Trust the B—- in Apartment 23,” but it will have to go head-to-head with one of Fox’s strongest newer shows, “New Girl,” along with Fox’s high-profile new series from Mindy Kaling, “The Mindy Project.”

Meanwhile, NBC also has its sights set on the hour, where it will put up its highest-profile new comedies: “Go On,” starring “Friends” alum Matthew Perry, and Ryan Murphy’s “The New Normal.” “At its upfront presentation yesterday, the network said the block is one of its two big priorities for next fall, meaning the two comedies will get a big marketing push,” the story reports.

ABC had its sights set on the hour a year ago, when it ended up abandoning plans to expand what was then an 8 p.m. comedy hour to two hours. At the time, ABC exec Paul Lee said the strength of Fox’s “New Girl” was reason enough to drop the plan, the story notes. Apparently ABC is feeling more confident about its comedy lineup now.