Roger Federer is preparing himself for a barrage of Kevin Anderson big serves after the Swiss superstar sealed his place in the Miami Open quarter-finals in just 61 minutes on Wednesday.
Federer, 37, is celebrating 20 years at this tournament and edged closer to his fourth title in South Florida as the up-and-coming Russian Daniil Medvedev was swatted aside 6-4, 6-2.
Next up for the 20-time grand slam-winning legend is the South African world No 7, who famously beat Federer at Wimbledon in 2018 over five dramatic sets.
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But having classily dealt with Medvedev, the former world No 1 knows it won't be as straightforward with Anderson at the other end of the Hard Rock Stadium's center court.
"I think if you beat me at Wimbledon, you've got my attention," Federer said. "He's got a great serve and I'm happy he's playing again after his injury.
Defending champion John Isner, meanwhile, powered his way to the semi-finals as Roberto Bautista Agut, who sent world No 1 Novak Djokovic crashing out in the previous round, was seen off 7-6, 7-6.
Isner will face Canadian teen sensation Felix Auger-Aliassime in the last four. The 18-year-old Auger-Aliassime became the youngest ever Miami semi-finalist after seeing off world No 13 Borna Coric 7-6, 6-2.
In the women's draw, Simona Halep moved closer to reclaiming the world No 1 ranking after a well-executed 6-4, 7-5 triumph over China's Wang Qiang.
Halep's recovery from 1-5 down in the second set showed the kind of mental toughness displayed by only the very best, and the Romanian is looking in good shape to land her first Miami title, even if she's not overly consumed about the prospect of reclaiming the No 1 tag.
"It doesn't mean everything to get back to No 1. It's more important to finish the year in that position," said the second seed. "But if I do it, I will be very proud."
Halep will meet world No 7 Karolina Pliskova in the last four on Thursday after she won the battle of the Czechs with Marketa Vondrousova 6-3, 6-4.
"The first set was very close, she played well but I just tried to be more aggressive, " said Pliskova after reaching her third semi-final of 2019. "A match against Simona is always intense."