Did he intend it? Clearly not. But Novak Djokovic still inadvertently shot himself in the foot when he recently let his frustration get the better of him at the ongoing US Open. The tennis ace had lost his serve at a crucial juncture in the first set against Pablo Carreno Busta. He should have kept calm and carried on. But instead he thwacked a ball with his racket without realising that it would end up smacking a line judge near her neck. Djokovic, of course, apologised immediately. But his remorse wasn’t enough. The tournament’s rules are such that the organisers had no option but to disqualify him entirely."

It meant that the World No 1 ended up losing all his ranking points and prize money. But such a momentary lack of judgment can play out in the average person’s personal and professional lives as well. A sense of frustration can come from, say, a colleague getting credit at work when you actually deserve it. Or, it can arise at home when you might be having an argument with a partner who is refusing to listen to your point of view.