THAT WAS JUST WHAT I WAS STICKING WITH. STEVE: LAST YEAR HE WAS RANKED 165. LOST IN THE FIRST ROUND. NOW HE'S IN THE SEMIFINALS AND HE'S IN THE RANKINGS IN THE TOP 206789 WHAT IMPRESSED YOU THE MOST FROM HIS PERFORMANCE? JON: ONE WAS PHYSICALLY HOW HE HELD UP. I WAS GETTING TEXT FROM PEOPLE, IT'S DISGUSTING HERE, WORST NIGHT OF THE SUMMER IN NEW YORK. HE PLAYED THROUGH THE HEAT AND HUMIDITY. FOR FRANCIS IT WAS A TOUGH PHYSICAL OUT, TOO. BEN SEEMED FRESHER. MORE ENERGY. WE CAN TALK ABOUT THE FRANCIS SIDE OF THE EQUATION. I JUST THINK TO HAVE THAT LEVEL OF ENERGY, THAT PRESENCE ON STAGE. I GO BACK TO THIS UNPREDICTABILITY. YOU DON'T KNOW WHAT THIS GUY WILL DO. WHAT SHOT HE'LL HIT. HE HAS ALL SORTS OF WEAPONS. INCLUDING THE SERVE. HE'S A REAL CHAOS AGENT OUT HERE. CHANDRA: I THINK FOR ME IT WAS HOW GUTSY BEN SHELTON WAS. THERE WERE SHOTS HE TOOK THAT A LOT OF PLAYERS WOULDN'T HAVE THOUGHT ABOUT IN THOSE MOMENTS. WE SAW THE ONE ON SET POINT. SET POINT DOWN IN THAT THIRD SET WHERE HE JUST WENT AFTER THE FOREHAND. I THINK THAT KIND OF GUTTED FRANCIS TIAFOE. THE END OF THE THIRD SET. THAT REALLY WAS THE MATCH. IT LOOKED LIKE THINGS WERE TURNING IN TIAFOE'S FAVOR. HE WAS THE TOP PLAYER COMING IN. MORE EXPERIENCED PLAYER. ALREADY A TERRIFIC TOURNAMENT BACKING UP THE SEMIFINAL FROM LAST YEAR. SO A LOT OF CHECK MARKS IN THE TIAFOE COLUMN. BUT I THINK WITH SHELTON IT WAS JUST INCREDIBLE HOW HE KEPT GOING AFTER THESE SHOTS. I WAS HAVING FUN WATCHING HIS DAD ON THE SIDELINE. AFTER THE TWO DOUBLE FAULTS IT WAS LIKE OH, MY STARS. WHAT JUST HAPPENED? THEN THE FOREHAND. IT WAS LIKE, YES. WE GOT IT. AND HE'S MORE USED TO SEEING HIS SON GO AFTER THOSE KINDS OF SHOTS. YOU COULD TELL, HE JUST GIVES HIM FREE REIGN TO LET HIM BE WHO HE S IT WAS FANTASTIC FOR US TO WATCH IT. STEVE: HE WAS THAT IT QUALITY. BIG MOMENT. ARTHUR ASHE STADIUM. TWO AMERICANS. THIS IS WHAT EVERYBODY WAS TALKING ABOUT. HE BROUGHT HIS GAME IN THE MOMENTS THAT MATTERED MOST. I WANT TO SPIN IT FORWARD. WHAT CHANCES DO YOU GIVE HIM AGAINST DJOVOKIC? PAUL: WE'LL SEE ABOUT THE BIG MOMENT NOW. IT WENT FROM PRETTY BIG TO UNBELIEVABLY BIG AGAINST THE MOST ACCOMPLISHED PLAYER IN THE HISTORY OF THE GAME. IT WILL BE A DIFFERENT LEVEL. TWO WORDS THAT GIVE HIM A GREAT OPPORTUNITY. JON SAID T CHAOS AGENT. HE'S GOING TO DO THINGS TO BREAK RHYTHM. THAT'S HIS OPPORTUNITY. ONE OF THE MOST AMAZING THINGS ABOUT BEN SHELTON AT HIS YOUNG AGE ALREADY HE KNOWS WHO HE IS AND HOW HE NEEDS TO PLAY TO BE SUCCESSFUL. CAN HE BACK THAT UP. CAN HE TRUST IT UNDER PRESSURE? WHEN YOU GET TO THE LAST FOUR AND TWO OF THE MAJOR, IT'S A DIFFERENT ARENA AND ENVIRONMENT. HOW GOOD IS YOUR OFFENSE? CAN YOU SWING FREELY? WE'LL FIND OUT AGAINST NOVAK BECAUSE IT'S A LOT OF TOUGH QUESTIONS. THE LAST THING I WANT TO CAP WITH, HE'S A LOT LIKE CARLOS ALCARAZ, HE HAS FUN WHEN HE'S OUT THERE DOING IT. HE ENJOYS THE MOMENT. FOR ME THAT'S GREAT TO SEE. HE EMBRACE IT IS AND LOVES IT. ALL THOSE WEAPONS YOU SHAKE YOUR HEAD AND GO KEEP SWINGING. STEVE: HE SAYS SOMETIMES YOU HAVE TO SHUT OFT BRAIN. CLOSE THE EYES AND JUST SWING. TRUST