The match got off to a routine start until Federer took control. It was nerves. I couldn't get a second serve in.
Auger-Aliassime was particularly frustrated with one game in the first set when he double-faulted three times while serving with a 5-4 edge. It was quite easy to be honest, I was successful in soccer, but it doesn't go at the pace as tennis goes, soccer takes many more years.
"I am happy to see Kevin playing again after his injury problems", Federer said.
Anderson refused to buckle and when he finally managed to get on the board by breaking the former world number one's serve, he was sarcastically applauded by some sections of what was a predictably pro-Federer crowd.
'It's like I caught a virus or something, ' he said.
The loss against Isner marked Auger-Aliassime's first in six career matches versus top-20 players. That's just very tough to swallow'.
Shapovalov reached the semifinals by beating 28th-seeded Frances Tiafoe 6-7 (5), 6-4, 6-2 - the third time in four matches at this tournament that he rallied from a set down before prevailing.
Federer invited Auger-Aliassime to train with him in Dubai a year ago, and said he loves Shapovalov's forehand and attitude.
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The missed opportunity seriously hurt Medvedev who capitulated once he was broken in the first game of the second. I just felt like, I don't know, the nerves got to me a little.
"Pretty insane. Everyone is super excited back home", said Auger-Aliassime, who wasn't in the top 100 of the world rankings two months ago and now will climb to No. 33 next week - if not higher.
She led 5-3 in the opening set and just unraveled.
A men's doubles match between twins Bob and Mike Bryan and Marcelo Melo/Lukasz Kubot was knotted at 2-2 on the Grandstand when rain halted play, but that match, and another scheduled doubles match were postponed until Friday to ensure the singles matches were completed.
Halep, who rallied from 5-1 down to take the second set, will try to reach her first South Florida final and reclaim the top spot by defeating the victor of a later all-Czech contest between world number five Karolina Pliskova and Marketa Vondrousova. 'To play in the stadium - the Super Bowl will be here next year - it's pretty unbelievable'.
'It's fantastic, ' Isner told the crowd after his latest win. The Swiss player did not pick a specific title first: "A big, big goal of mine which I was able to achieve was to become world No".
The women's final Saturday will match No. 5 Karolina Pliskova of the Czech Republic against No. 12 Ashleigh Barty of Australia. "But if I do it, I will be very proud".