Wow, tennis fans—Learner Tien just pulled off something no one else has in Melbourne! The young American sensation crushed Medvedev in straight sets and is now the first male player born in 2005 to reach a Grand Slam quarter-final. Not only that, but Tien is the youngest American to make the last eight since Andy Roddick in 2001. Could he go even further than Roddick did? Next up: a huge clash with Zverev. The future is now! #Sports #Tennis #LearnerTien