The greatest ones go on too long. Perhaps it’s inevitable. They’ve spent their lives proving people wrong by redefining the limits of the possible. So why not keep doing it? After vanquishing so many difficult opponents, who can blame them for trying to take on the toughest one of all? Even if we know that time gets us all in the end. When Tom Brady met Cristiano Ronaldo on the Old Trafford pitch after Manchester United’s 3-2 win over Tottenham Hotspur in March it felt like a summit meeting between two sporting immortals. Ronaldo scored a hat-trick that day which...