NBA star Nick Young is being investigated by police after allegedly punching a fan in the testicles and stealing his phone, it has been revealed.

TMZ reported that the veteran guard has been named as a suspect in an alleged robbery last week which took place at a popular car was in Los Angeles.

According to the website, the Los Angeles Police Department received a call on January 4 from a man who claims he was assaulted by Young.

Young is being investigated by police after the alleged incident at a popular Los Angeles car wash

The alleged victim had reportedly tried to take a photo with the basketball star after recognizing him - but was denied.

Despite being told not to take a picture, however, the man allegedly attempted to take a photo anyway.

Young then reportedly flew into a rage and smacked the man in the testicles before making off with his phone.

Police have reportedly taken a report and are investigating the disturbing incident, although no arrests have been made so far.

Young is a veteran NBA guard having played for some of the biggest teams in the US. Most recently he was drafted in by the Denver Nuggets (pictured) as injury cover

Young, known by his nickname, 'Swaggy P', had a successful 11-year career in the NBA during which time he played for teams like the LA Lakers and Clippers.

Most recently he was drafted in as injury cover for the Denver Nuggets, but was waived on December 30 after his short stay with the franchise.

Young has courted controversy in the past after he was sued for allegedly attacking a man at a church basketball game.

He was also arrested in August 2018 for obstruction of justice after he was pulled over by police.

Young had been engaged to Australian rapper Iggy Azalea until their relationship ended abruptly 18 months ago, after it was revealed that he had conceived a child with his ex-girlfriend.

Nick and Iggy called off their engagement in June 2016 as a result of the messy scandal that came about from his having conceived a child while still with the star.

The home they shared in Tarzana, California, was sold in August for $3.25million - three years after Nick purchased the property for $3.45million from Selena Gomez.

He went on to date R&B singer Paloma Ford in September of last year, but the two revealed just four months later that they had 'grown apart' and ended their romance.