Spain, with Feliciano Lopez, faces Great Britain, which has two top doubles players in Jamie Murray and Dominic Inglot. Australia will host Germany: The Aussies can choose from a range of players to team up with world No. 4 John Peers, while Germany’s top doubles player for the tie is Alexander Zverev, ranked No. 101.
Doubles could be particularly crucial in the Kazakhstan-Switzerland tie: With no favorites in the singles match-ups, the middle rubber will be key, featuring players with rankings well in the triple digits. That’s nearly the opposite of the tie between defending champion France and the Netherlands. The French squad features two top players in Pierre-Hugues Herbert and Nicolas Mahut to complement its singles stars, while the Dutch team is comprised primarily of doubles specialists, led by Jean-Julien Rojer.