He was ahead 8-5 in the first-to-10-point deciding game when he became embroiled in a long argument with umpire Thomas Sweeney of Australia after a wrong call of out. He completely lost it after the point was awarded, correctly, to Nishikori who had played a winner despite the bad call, but Carreno Busta thought the point should have been replayed.
The incandescent Spaniard lost the next four points and the fourth-round match and was jeered loudly after launching his kit and racquets towards the exit. It overshadowed marathon man Nishikori's epic recovery from two sets down to set up a last eight clash against top-ranked Novak Djokovic. "Obviously I'm very sad, no, because after five hours fighting, after five hours' match, the way that I leave from the court wasn't correct, and I'm so sorry, because that's not me," Carreno Busta told reporters.
It was never-say-die Nishikori's third five-setter of the tournament, the second time he came from two sets down and his second triumph via a final set 10-point tie-break, newly introduced for this year's tournament.