That sounds obvious, right? I would have thought so. But this Washington Post article on U.S.-China trade issues seems to conflate the two. There's a lot to criticize in the article, but I want to focus on these two sentences:
WTO challenges are not the only tool the United States has to try to open China’s market. The Commerce Department has imposed dozens of tariffs on Chinese products considered unfairly priced or subsidized.
Now, World Trade Organization complaints are certainly a way to open foreign markets. But imposing tariffs on foreign products through anti-dumping and countervailing duties is not, repeat not, a way to open foreign markets. Rather, it is a way to close our markets. Not the same thing at all.