Tsitsipas follows up Federer upset by reaching first Slam semifinal

 Lest anyone get the idea that Stefanos Tsitsipas's upset of Roger Federer was a fluke, the 20-year-old from Greece followed it up by beating No. 22 seed Roberto Bautista Agut 7-5, 4-6, 6-4, 7-6 (2) at the Australian Open on Tuesday to become the youngest Grand Slam semifinalist since 2007.

"That was a great win. It got people's attention," Tsitsipas said about his fourth-round stunner against two-time defending champion Federer on Sunday. "My biggest challenge was to stay concentrated, stay focused," in order to show that the previous victory "didn't happen accidentally."

Cheered on by a loud, flag-waving contingent of Greek fans inside and outside Rod Laver Arena, Tsitsipas again displayed his varied skill set, with 22 aces, 30 more winners than unforced errors (68-38) and a nose for getting to the net.

He was down a break in both the first and third sets before...