Look: Tiger takes in US Open semifinal from Nadal's box

Tiger Woods loves watching great athletes in big moments, so it's no surprise he's taking in Rafael Nadal's semifinal match against Juan Martin del Potro at the U.S. Open.

Woods was seen sitting in Nadal's box for the match at Arthur Ashe Stadium Friday night as the Spaniard seeks to make his fourth career US Open final.

The 41-year-old golfer has been recovering from back surgery he underwent in April, but released a video on Twitter last week stating he's been cleared to start hitting pitch shots.