Ken Rosewall Arena: Jaume Munar will take on Sebastian Baez in the men's singles, while Jéssica Bouzas Maneiro will play Solana Sierra in the women's singles when Spain kick off their campaign against Argentina in the United Cup mixed team tennis competition in Perth on Friday.
The four players will be involved in a mixed doubles clash to decide the outcome of the match in case they fail to reach a verdict in the singles clashes.
In other matches, Greece will face Japan with Maria Sakkari taking on Naomi Osaka, while Stefanos Tsitsipas will clash with Shintaro Mochizuki in the men's singles encounter on the same court as the fourth edition of United Cup, the international hard-court event hosted by Tennis Australia, which is played across Perth and Sydney.