He won't answer such questions.
A reporter asked Sherman that question during Sunday's Super Bowl media availability at the Arizona Grand Resort and Sherman scoffed.
"I don't really answer preschool questions," Sherman said. "So, you improve your line of questioning and then we'll talk."
A reporter followed up by asking Sherman if his response meant he was "intimating" the answer was obvious -- that he was, in fact, the best corner in the league.
"I wasn't intimating anything," Sherman said. "I like journalists. I don't like people who just throw out dumb questions and try to incite controversy and let the story write itself.
"I like people who dig deep and research and actually have some journalistic credibility."
"I don't measure my game to anybody's," he said. "I don't have a great answer for that question. I think my game measures up pretty well to myself."