US and them

A co-worker and myself had a discussion about the AP, tennis and style. Although on the tournament's website, it is listed as US Open, yet the AP always uses U.S. Open (except in today's story's headline, which is wierd). I'm in the US Open camp, but he insists that it is the United States Open, meaning you need U.S.

Wanted a few different takes (hopefully in my favor).

 

Either can be grammatically correct. If AP Style is U.S., and your publication follows AP Style, then use "U.S."

 

Glenn Beck is an "us." Muslims are a "them." [/crossthread]

 

As long as they're consistent.

 

But if it's the actual name of the tournament, shouldn't it be "U.S. Open" in headlines?

 

The formal name of the tournament is the United States Open tennis championships. This can be shortened to U.S. Open.

It is also informally but officially known as the US Open.

Either is correct, but you have to pick one and stick with it for style.