 Whenever I play a game against a stranger, a person I don't know, I tend to bring out my full potential and play without worrying about the outcome of the game. But when I play against someone known to me, it becomes very hard to bring out that potential. What should I do to overcome this? Unknown to you means a non-competitor or a friend? A known person. A friend. You don't have to win against a friend, it's okay. And anyway, if you're playing about a serious competition against an opponent, you must understand the more familiar you are about his ways of doing things or her ways of doing things, the more enabled you are to defeat that person. So, an opponent should never be a stranger. Today, all sports people are spending hundreds of hours watching videos of their opponents. This happened in the year 98-99. Andrea Garcia and Boris Becker played three games. All Boris Becker beat Andrea Garcia because he had such a… you know, he was called boom-boom because Boris Becker was called boom-boom because of the service. His serves were so powerful, there was no game. Every time he will serve, serve and finish the game. Nobody returns the ball. So, Andrea Garcia went back and studied hundreds of hours of Boris Becker's serves. Then he figured it out. Then in the next three years, he played eleven games with him and beat him on ten of them. And I'll tell you what happened. After Boris Becker retired, they met in Germany, there's something called the Oktoberfest in Germany, they were there and at that time they were together and Andrea Garcia thought, okay, anyway he's retired, now I can tell him because this bothered Boris Becker big time, nobody can beat him but this guy is getting at him. So he told him, see, I observed your videos continuously and I figured out that whenever you're serving the ball towards the boundary line, Boris Becker, if you know, when he's serving, his tongue sticks out a little bit. When he throws the ball up and comes down, his tongue sticks out. Said whenever you're serving towards the boundary line, your tongue goes to the left. When you're serving straight, it comes out straight. I observed this, the moment your tongue sticks out to the boundary line, I was already there every time taking the ball. So Boris Becker literally fell off his chair, he couldn't believe this. And he said, any number of times I went home after the matches and I told my wife, he seems to be reading my mind. But you've been reading my tongue, it's almost poking. So your opponent should be never unfamiliar to you. You must make him familiar. You must know him better than he knows himself. It's most important.