Mean Girls at Work: How to Stay Professional When Things Get Personal is the latest title from Katherine Crowley and Kathi Elster, the authors of Working With You Is Killing Me, and the authors say they were just as conflicted as I was to take on the issue of backstabbing, bullying and plain old bitchiness at work.

FORBES: The Seven Meanest Girls At Work

Semenya went on to win the world title in another personal best time of 1.55.45 seconds, two seconds clear of defending champion Janeth Jepkosgei.

BBC: SA chief issues Semenya apology

Hardee was ahead after seven events and going into the final 1, 500m he was so comfortable that he could afford to clock a time about six seconds outside his personal best and still capture the title.

BBC: Walker storms to 400m hurdle gold