Serena Williams says she couldn't focus during the heaviest defeat of her entire career because her sister's murderer had just been released from prison

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• Serena Williams was unable to focus during a recent match as she had just found out on Instagram that her sister's killer had been released from prison.
• 10 minutes before she was scheduled to face Johanna Konta in July, Williams discovered the news — and went on to suffer the heaviest defeat of her entire 23-year career.
• She says she has not yet forgiven the killer.

Serena Williams recently suffered the heaviest defeat of her 23-year professional tennis career last month, and has claimed her poor performance was because she found out her half sister's murderer had been released from prison just moments before she was due to compete.

Williams was beaten 6-1, 6-0 in 53 minutes by Johanna Konta at theMubadala Silicon Valley Classic in San Jose, California, last month.

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SEE ALSO: Serena Williams just suffered the heaviest defeat of her entire 23-year professional tennis career