Germany advances to semifinals of United Cup against Australia

(Photo credit: Danielle Parhizkaran-USA TODAY Sports)
Alexander Zverev led Germany to the United Cup semifinals with a pair of key victories in a 2-1 upset of Greece on Friday in Sydney, Australia.

The Germans, seeded 16th, fell behind in the opening match when Greece's Maria Sakkari steamrolled Angelique Kerber 6-0, 6-3, winning the first nine games before Kerber got on the scoreboard.

Kerber was playing just her third