Here's a look at the tee times and groups for the first and second rounds of the 2025 Open Championship on Thursday, July 17, and Friday, July 18.

The Open begins Thursday morning at Royal Portrush as the best golfers in the world vie for the final major of the season in Northern Ireland. This 2025 Open Championship will result in some early mornings -- or late nights, depending on your vantage point -- for fans stateside if they hope to keep up with their favorite players.

3:14 a.m.-8:15 a.m. — Thomas Detry, Belgium; Chris Gotterup, United States; Lee Westwood, England. 3:25 a.m.-8:26 a.m. — Patrick Cantlay, United States; Cameron Young, United States; Mackenzie Hughes, Canada.