US tennis star Serena Williams has penned an emotional letter to Facebook to speak out against police violence.
Yesterday, Williams recounted an incident when she was being driven around by her 18-year-old nephew and saw a police officer on the side of the road which led her to fear for her relative's safety.
In the post she wrote: 'Today I asked my 18 year old nephew (to be clear he's black) to drive me to my meetings so I can work on my phone #safteyfirst. In the distance I saw cop on the side of the road. I quickly checked to see if he was obliging by the speed limit.
'[Then] I remembered that horrible video of the woman in the car when a cop shot her boyfriend," referring to the fatal shooting of Philando Castile on 6 July whose girlfriend live-streamed the confrontation with police in Minnesota.
Williams went onto explain how she is a 'total believer' that not everyone is bad and recognises racial inequality is born in those who are 'ignorant, afraid, uneducated, and insensitive'.
'Why did I have to think about this in 2016? Have we not gone through enough, opened so many doors, impacted billions of lives? But I realized we must stride on - for it's not how far we have come but how much further still we have to go,' she added.
Speaking out about the on-going tension between the law enforcement and the black community in the US, the 35-year-old questioned what would happen if people didn't speak out against racial injustice: 'I had to take a look at me. What about my nephews? What if I have a son and what about my daughters? As Dr. Martin Luther King said " There comes a time when silence is betrayal.'
She concluded by vowing never to ignore racial inequality: 'I won't be silent'.