Tennis star Serena Williams learned a valuable lesson in golf etiquette Friday at the Honda Classic in Palm Beach Gardens, Florida.

As Tiger Woods stepped to the tee box at No. 17 Williams took out her iPhone to take a snap of the golfer but was interrupted by a tournament official and Williams shocked face was also caught on video.

William tweeted about the incident, "Ok at this Golf tournament. Just saw @tigerwoods I understand NO golf Apparently u can't take pics. This security for mad and yelled at me."

The tennis champ defend herself as she added, "Apparently u can't take pictures of golfers. In my Defense peeps [people] always take pics of tennis players."

Regardless, Williams managed to take a photo of woods on the green and posted it on the social media site.

"Tiger Woods at the golf tournament I am at," the athlete noted.

In the video below Williams can be seen among the spectators watching Woods up close at the Honda Classic. As commentators take note of Williams and take note of the athlete as one of the best tennis players in the world.

As she attempts to take a photo from her iPhone a tournament official standing nearby was quick to wave his arm to get her attention and then let her know that taking photos was not allowed.

William's expression as see in the video says it all, as she is shocked beyond belief. Watch the incident unfold below.