Roger Federer will return to partner Belinda Bendic for Switzerland at the Hopman Cup, while Japan will make its first appearance in 16 years at the international mixed team event.
After the last Hopman Cup, Federer went on to win the Australian Open and Wimbledon, his 18th and 19th Grand Slam singles titles.
Two-time Grand Slam singles Angelique Kerber will represent Germany with ATP No. 4 Alexander Zverev, tournament officials said Wednesday.
Yuichi Sugita and Naomi Osaka will play for Japan, while Australia will be represented by Daria Gavrilova and Thanasi Kokkinakis.
The other teams in Dec. 30-Jan. 6 event at Perth Arena are: the United States: Jack Sock and CoCo Vandeweghe; Russia: Svetlana Kuznetsova and Karen Khachanov; Belgium: David Goffin and Elise Mertens; and Canada: Eugenie Bouchard and Vasek Pospisil.
Harrison advances
TOKYO: Ryan Harrison withstood the big serve of Kevin Anderson and advanced to the quarterfinals at the Japan Open on Wednesday by beating the U.S. Open finalist 6-3, 1-6, 7-6 (2).
Anderson landed 24 aces in the match, but the 52nd-ranked American overcame the barrage and will next face top-seeded Marin Cilic.
Cilic advanced with a 6-3, 6-4 victory over Yasutaka Uchiyama, a Japanese player who won in his ATP main draw debut in the first round. Cilic dropped only four points out of 34 on his first serve. Adrian Mannarino and eighth-seeded Diego Schwartzman also advanced to the quarterfinals. Mannarino beat Jiri Vesely and Schwartzman defeated Bernard Tomic.
Fourth-seeded David Goffin, last year's runner-up, started his campaign with a 7-5, 6-1 win over Feliciano lopez. The Belgin will next face qualifier Matthew Ebden in the second round.