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Serena Williams Troll Receives Amazing Put-Down From JK Rowling

11/07/2015 17:47 BST | Updated 12/07/2015 14:59 BST
Lefteris Pitarakis/AP
FILE This is a Thursday, Sept. 27, 2012 file photo of British author J.K. Rowling as she poses for the photographers during photo call to unveil her new book, entitled: 'The Casual Vacancy', at the Southbank Centre in London. A lawyer who let slip J.K. Rowling's secret thriller-writer identity has been fined 1,000 pounds ($1,645) for breaching client confidentiality rules. Chris Gossage of London law firm Russells Solicitors which represents Rowling told a friend of his wife that the "Harry Potter" creator was author of "The Cuckoo's Calling," published last year under the name Robert Galbraith. The friend tweeted the information, and it was followed up by the Sunday Times. (AP Photo/Lefteris Pitarakis, File)

When one Twitter troll responded to JK Rowling's admiring tweet about Wimbledon 2015 champ Serena Williams, the inspiring author was having none of it.

Following the world number one's success in Saturday's women's singles finals, Rowling tweeted: "#SerenaSlam! I love her. What an athlete, what a role model, what a woman!"

But user @diegtristan8 thought it wise to respond this way...

serena williams

Bad move pal.

The Harry Potter author wasted no time in delivering this zinger of a reply...

Magical.

The message received thousands of favourites and retweets, and many people tweeted their support for Rowling...

Williams beat Garbiñe Muguruza 6-4 6-4 to win Wimbledon for the sixth time on Saturday afternoon.

The world number one now holds the grand slam after winning all four major titles.

She has now won 21 grand slams - needing just one more to beat Steffi Graff's record.

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