U.S. pair Steve Johnson and Jack Sock kept the Davis Cup quarter-final against Australia alive with a gritty five-set win over John Peers and Sam Groth in Brisbane on Saturday.
Hewitt did not rule out making a change to his doubles line-up with John Peers and Sam Groth scheduled to meet Sam Querrey and Steve Johnson for the third rubber, but teams can make changes on Saturday morning under Cup rules.
Sock and Johnson battled from a set down to claim the second set and then claimed a 4-0 lead in set three.
USA captain Jim Courier said his team was capable of winning both matches Sunday and reaching the semi-finals.
Kyrgios, who at one point trailed 1-4 in the third set against Querrey, won both singles matches in the tie in straight sets against top 30 opponents, reports Efe.
"I've got a head cold right now and trying to fight through it - not feeling great".
"Obviously the way I've been playing for the past two months has created an expectation these couple of days", he added.
"At the end of the day we played the big points better at the end". The British player, drafted into the singles line-up after the injury-enforced withdrawal of world number one Andy Murray, was made to pay for letting slip a 5/2 lead in the second-set tiebreak.
"I haven't been going back to the hotel hating the game or trying to just get through every day", Kyrgios said.
That worked for a while Sunday during an evenly-played first set, but Kyrgios gradually overpowered the American with his strong serves and backhand.
The decision looked poised to backfire as Peers and Groth raced out of the blocks to win the first set in just 27 minutes, and they looked good value to continue their positive Davis Cup run after previous doubles wins against the Czech Republic and Slovakia.
The crowd at Brisbane's Pat Rafter Arena went wild when Kyrgios, the world No.16, sealed the win against Querrey, who had beaten the Australian on his way to winning the title in Acapulco in February.
"When you see players that have so much skill and charisma start to put it together, it's exciting for everyone involved in tennis".
In the fifth set, the Americans broke Peers' serve to love and outplayed the Australians to clinch the match.
Success allowed Sock to gain a measure of revenge on Thompson after his surprise singles defeat to the 22-year-old, and he told daviscup.com: "Jordan played great yesterday, he deserved to win, he was the better player".