Shapovalov, Auger-Aliassime both fall in Miami Open semifinals

The young star is building a reputation of his own by becoming the youngest semi finalist at the Miami open in 35 years by beating 11 seed Borna Coric of Croatia 7-6 6-2 to match up a semi final pairing against defending champion John Isner who on his path beat Robert Bautista of Spain 7-1 7-6.

"I know what to expect", Federer said.

"I just felt like, I don't know, the nerves got to me a little", said Auger-Aliassime.

Sharing a birthday with Roger Federer is a good start for any tennis player, but "youngest ever" tags are attaching themselves to Felix Auger-Aliassime more than they ever did to the teenage Swiss.

Looking ahead to facing hard-serving Isner, Federer said in his on-court postmatch interview, "I honestly love big servers, to watch them, (to see) if they're going to ace every second or third point".

Felix Auger-Aliassime continued his superb run at the Miami Open, setting up a semi-final showdown with defending champion John Isner on Wednesday.

"It's a chance you can't miss, serving two times for the set", he said.

"Denis is a great player", Federer said, "and he will be even better in the future".

Barty, who will rise to a career-best No. 9 in the world rankings next week, will face fifth-seeded Karolina Pliskova in Saturday's final after she toppled second-seeded Simona Halep.

Based on his performance, Auger-Aliassime is also projected to crack the Top 50 of the ATP Rankings next Monday, becoming the first player born in the 2000s to do so. The cardio thing I have dealt with since I was eight, so I wasn't scared for my health or anything, I just couldn't believe it happened at that moment.

Auger-Aliassime, who came into the tournament ranked 57th in the world, is guaranteed to move up to at least 41st next week with his latest victory.

The shortcomings against Isner should not overshadow the fact that Auger-Aliassime served brilliantly and to devastating effect in winning other matches - ideal examples being against No. 36 Marton Fucsovics in the second round and No. 19 Nikoloz Basilashvili in the round-of-16. Even the first serve, I mean, if you put it in, you don't have to hit the second serve.

Isner now awaits the victor of three-times champion Roger Federer and another young Canadian hot shot, 19-year-old Denis Shapovalov, who play later on Friday. He can really put you in uncomfortable situations.

Shapovalov rallied from a set down with two breaks in the second set and another two in the third against the 28th-seeded Tiafoe.

"When I go in a match, I always look forward, always try to look for the best outcome".

The French Open victor will play No. 5 seed Karolina Pliskova for a spot in the final.

Auger-Aliassime served for both sets, but Isner broke each time by taking advantage of double-faults, and used his big serve to control the tiebreakers. I think I will do at the end of the tournament.

Auger-Aliassime is the youngest player left in a tournament where plenty of youngsters have made splashes, yet he says there's no time right now to think about how rapidly his stock is rising.