The Fijians, cheered on by a partisan sell-out crowd, were brutal in the tackle at times, laying the platform for a 32-14 win.
Aston’s men struggled with ball in hand as a result, but the coach was proud of how his charges dealt with the physicality of the Pacific islanders.
White played a total of 67 minutes, making 36 tackles and 19 carries for a total of 109 metres, according to the Opta stats.
Aston said: “We can take a lot of positives. You’ve got to single out Brett White, he was the best player on the field by a country mile.
“We’ve only been together for 10 days and at times we showed a lot of character. We should have put more pressure on them to get a result.”
Ireland were 10-0 down inside the first 13 minutes, before the game got tasty. Fiji‘s physical approach saw them get on the wrong side of referee Phil Bentham on a number of occasions, and Ireland took advantage through a Tyrone McCarthy score.
Aston added: “A lot of people are saying we were a bit rusty in the first period. All credit to them, Fiji were very good and they were very quick out of the blocks and it took us a little bit of time to get in to it.
“Once we got back into it and got a bit of rhythm, we got ourselves back into the game. We are a little bit disappointed because we knew we could have got a little bit closer, and maybe we could have taken it at the end.
“We have to take a lot of things out of this, we are in the toughest group and we are looking forward to it (England on Saturday).”