Germany had a rest day on Friday, but still qualified to the Davis Cup final eight in Malaga in November after the United States defeated 3-0 Slovakia. Mackenzie McDonald defeated Lukas Klein 6-4, 6-3 in the first game before Brandon Nakashima prevailed 6-3, 6-3 against Jozef Kovalik in Zhuhai, China on Friday. Austin Krajicek and Rajeev Ram completed the 3-0 win with a 6-7 (4-7), 7-6 (7-4), 10-1 triumph in the doubles match against Klein and Norbert Gombos. Germany defeated Chile 3-0 on Thursday and thanks to the US win they are sure to finish among the top two in Group C. Germany and the US …