Video: Tiger Woods Delivers Multiple Fist Pumps Watching Rafael Nadal at US Open

Tiger Woods clearly has nothing but respect for 18-time major winners.

The golfing legend, who has 15 majors himself, has made a career of chasing Jack Nicklaus' record of 18 major championships and was in attendance at the U.S. Open on Monday to adamantly cheer on another 18-time Grand Slam winner.

Woods watched Rafael Nadal defeat Marin Cilic 6-3, 3-6, 6-1, 6-2 in the fourth round and didn't hold back the celebration following an incredible point from the victor in the final set:

Woods was in attendance with his son and reacted after the match:

While he struggled in the second set, Nadal eventually put Cilic away with the help of his strong serve. According to the U.S. Open's official website, he won 83 percent of his first-service points compared to 59 percent for his opponent.

He also converted six of 11 break points he created, proving he can win in multiple ways.

Yet, it was Woods' status as one of his idols that was on his mind after the match:

Nadal will face Diego Schwartzman in the quarterfinals and figures to advance if history is any indication. He holds a commanding 7-0 advantage in their head-to-head matches, meaning Woods will likely have multiple chances to watch Nadal as the U.S. Open continues.