"Hoad served 11 aces to Trabert’s six. Many of these powerful services came at game-saving points."
"During the match [Hoad] saved nine game points, mainly with aces or strong serves."
These statements in the Sydney Morning Herald seem to be exaggerated, actually. Checking the details of the reports in the Herald, none of Trabert's aces occurred on break points. Four of Hoad's aces, at most, occurred on break point, and possibly only two.
But those two were critical. Serving for a two-set lead, Hoad fell behind 15-40, and put in two clean aces. Two points later he took the set 6-3.