Team World captain John McEnroe fumed after Nick Kyrgios was forced to pull out of his match with Dominic Thiem with injury.
Kyrgios was due to face Rafael Nadal in the second match of the day but the Spaniard pulled out with a hand injury.
But following the first match which saw John Isner and Jack Sock beat Roger Federer and Stefanos Tsitsipas, McEnroe announced Kyrgios will not be able to play.
He said: “Unfortunately Nick is not ready to go. We are going to be going into conference. Stay tuned.”
It was then confirmed that Thiem would, in fact, face Taylor Fritz.
McEnroe was then asked to explain what was going on and his dissatisfaction was clear.
He said: “Nick’s shoulder has been bugging him. He was talking about it last night.
“I don’t know what to tell you other than we wanted him to come out 100 per cent and he didn’t feel like he could. So that means we’ve got to put somebody else in.
“We were told on the way over that Rafa couldn’t play. Well that means you can’t play the same guy and that sort of limited our options.
“I thought Denis was playing well and Taylor played well also. But we were looking to maybe put Denis in.
“I’ve always been maybe not a stickler for rules. The last day, we are supposed to be matching up the way we want to and it ends up being the total opposite. That’s too bad.
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