Selena Gomez and Justin Bieber - (Photo: Dailymail)

Although Selena Gomez and Justin Bieber are both not admit their love relationship, but both returned spotted performing together.

Citing dailymail, they watch a boxing match on Saturday night (13.09.14). On the same day, they also walked side by side while in the Hard Rock Hotel, Las Vegas.

Selena was seen wearing a bikini and hotpants, while Justin wore only shorts and shirtless.

Previously, Justin had posted a photo of herself that was at the Hard Rock Hotel. In the photo, it appears a brown-haired girl in the back side of Justin. The girl looks like Selena Gomez.

"At the @HardRockHotelLV pool before heading over to see the Champ" Justin wrote.