Watch: Tom Brady battles sumo wrestler; left in awe

Patriots quarterback Tom Brady became a sumo wrestler for a day.

Tom Brady has been in China this week on a promotional trip for Under Armour. A few days ago, we saw him at the Great Wall of China.

We also saw him meditating.

On Wednesday, he spent his time with sumo wrestlers, which left him impressed in a big way.

Despite his amazement at the athleticism and physicality of the wrestlers, Brady was not afraid to mix it up. He was the definition of cool, calm and collected before doing battle.

Unfortunately for the future NFL Hall of Famer, he couldn't move his opponent an inch. Or half an inch, for that matter.

But the day was still memorable for Brady, who shared his experience with his 9-year-old son, Jack.