Lleyton Hewitt is on standby to come out of retirement as playing captain, with Nick Kyrgios withdrawn due to illness from the Davis Cup that will be live on Channel 7, 7TWO and the 7Tennis app starting tomorrow.

Sam Groth replaces Kyrgios and will face John Isner in singles first up from 11am AEDT, followed by Bernard Tomic taking on Jack Sock.

Groth and John Peers are slated for the doubles against the Bryan bothers on Saturday, however Hewitt could find himself playing the doubles or Sunday’s reverse singles.