WBC/WBA welterweight champion Floyd Mayweather Jr. sits in his corner between rounds during his title fight against Marcos Maidana of Argentina at the MGM Grand Garden Arena in Las Vegas, Nevada
WBC/WBA welterweight champion Floyd Mayweather Jr. sits in his corner between rounds during his title fight against Marcos Maidana of Argentina at the MGM Grand Garden Arena in Las Vegas, Nevada September 13, 2014. REUTERS/Steve Marcus REUTERS

Floyd Mayweather and Justin Bieber had some spare time to spend and they both shared snaps of what they did together when had some free time. Instead of hangout out some place, the pair made their leisure time productive by doing useful exercises as Mayweather trained the pop singer to box and throw some punches.

On October 17, Mayweather and Bieber shared clips and pictures of their little outing together on Shots, a photo-sharing social media application that is funded by both celebrities. Bieber was wearing a pair of Los Angeles Clippers shorts and a pair of sneakers with sparring gloves. Mayweather, on the other hand, was wearing pads on his hands for Bieber to hit.

"Training and having a good time with @justinbieber." "See more inside @shots," Mayweather wrote on Twitter. "Training with the champ @FloydMayweather tonight," Bieber also tweeted.

It is no secret that Mayweather and Bieber share a special friendship. The Canadian pop singer has walked Mayweather to the ring for a number of his fights. Bieber, along with rapper Li'l Wayne, previously escorted Mayweather to the ring in May for his fight against Argentine boxer Marcos Maidana. Bieber also walked Mayweather to the ring for his fight against Saul "Canelo" Alvarez in September 2013.

According to The Inquisitor, Mayweather and Bieber have been friends from three years. Mayweather's daughter, Iyanna, is also a fan of the pop star. Bieber was in attendance when Iyanna turned 13 years old in May 2013.

In June, Mayweather's kids got into a road mishap and Bieber was there to make sure that everything was okay. TMZ Sports reported that Mayweather was at the red carpet for the BET Awards when the accident happened. The unbeaten boxer was on the phone with Bieber, who also happened to be in a town nearby. Since Mayweather couldn't come right away, Bieber played the role of a compassionate friend and rushed into the accident scene. After speaking with the police officers, Bieber was allowed to bring Mayweather's kids to his vehicle and drove them to the boxer. Mayweather was extremely grateful of Bieber's act of kindness toward his kids.