Niall Horan Heads Back to Arthur Ashe Stadium for U.S. Open Day Five

Niall Horan looks focused as he spectates a tennis match during the fifth day of the 2015 U.S. Open on Friday (September 4) in New York City.

The 21-year-old One Direction singer must be an avid tennis fan, as this is the second time he’s been spotted at a match! Niall stopped by a game during day two of the Open earlier in the week.

PHOTOS: Check out the latest pics of Niall Horan

Other celebrities in attendance included Kelly Rowland, who also stopped by a match earlier in the week, and golfing pro Tiger Wood along with his eight-year-old daughter Sam (not pictured).

10+ pics inside of celebrities enjoying day five of the U.S. Open…