The former men's world No1 Marat Safin once said that the reason Maria Sharapova is so strong mentally is because she is not really Russian, that her many years spent in the United States had hardened her.
Manny Pacquiao's loss to Timothy Bradley shocked nearly all obersvers - notably the fighters themselves.
Timothy Bradley was outboxed and outpowered by Manny Pacquiao at the MGM Grand in Las Vegas on Saturday night, yet was somehow awarded a split decision that again shocked the boxing world.
This is now, suddenly, a very serious series.
Rory McIlroy is a stranger to adversity, a feted protege who became a gilded teenager who blossomed into a hugely successful professional.
England's team to face South Africa in the first Test on Saturday should encourage junior club players everywhere.