Johanna Konta heads Great Britain's Fed Cup team for their match with Japan in the World Group II play-offs.
Wimbledon semi-finalist, and British number one, Konta and Heather Watson are the singles players for the tie on hard courts at the Bourbon Beans Dome in Miki, Japan.
Doubles specialist Anna Smith and debutant Gabi Taylor also feature.
Britain have not played in the World Group since 1993.
A win would secure their place in World Group II in 2019 but a loss would mean they return to the Europe/Africa Zone next year.
Saturday, 21 April
04:45-09:00 BST- Connected TV and online