Tennis has never known a fighter quite like Rafael Nadal - but even the sport's ultimate warrior could be forgiven for feeling "mentally destroyed" at his Australian Open exit and "super tired" at the prospect of yet another debilitating battle with injury.
He's put his battered body through so much punishment for so long now that as he walked gingerly away from Rod Laver Arena - dethroned, dispirited and with a dodgy hip - there was inevitably a nagging question over whether Nadal might just be waving farewell to Melbourne Park at 36.
