i know chung, who won the inaugural nexgen tournament, the best players under 21 organised by the atpd the out djokoviced djokovic. very exciting to watch. then you have sandgren, a bit ofan to watch. then you have sandgren, a bit of an unknown, 97 in the world. his debut in australia, never won a grand slam match before this year and then he's in the quarter—finals and then he's in the quarter—finals and he's done it the hard way, he defeated number nine seed wawrinka, not fully fit, though, after knee surgery, not fully fit, though, after knee surgery, then dominic thiem, you can't say he's not fully fit, he a lwa ys can't say he's not fully fit, he always is. he came through that one in five hours. he's looking relaxed, he's playing his tennis, enjoying his tennis and would you believe the 58th ranked chung or the 97th ranked sandgren will be in the australian 0pen semifinals, it's incredible to think we moments away from them walking out to rod laver and i'm excited to see how they get on and how they perform on this court, will the nerves get to them? they both have big games so