England scrum-half Ben Youngs admitted it was frustrating to concede three tries to Fiji in an otherwise one-sided win.
Nemani Nadolo, Leone Nakarawa and Metusiela Talebula all crossed in a 12-minute spell for Fiji either side of half-time, as England lapsed in defence having already scored five tries by the half-hour mark.
Youngs called on England to learn to keep the pressure on against the opposition moving forward, as England racked up their 11th win of the year.
"We could probably be a bit more ruthless when we get chances because we left a few out there – it could have been 12 or 13 tries," Young said.
"The tries we conceded were annoying and we should have done better in holding them out. How to keep our intensity and foot on the throat is a lesson for us. There’s certainly more to come and that’s exciting, we just need to iron out certain areas."
Argentina are next up for England with los Pumas coming off back-to-back losses to Wales and Scotland.
Young recognised that England had been caught out at time by Fiji's quick passing and that Argentina will pose a similar threat with their expanise attacking game next Saturday.
"I’ve watched them closely in the Rugby Championship. They’re exciting and they’ve changed their style from scrum, maul and kick to becoming an adaptable side," Young added.
"They move the ball a lot and at times we got caught by Fiji so they will be looking at that and thinking they can exploit.
"They’re a physical, fast, expansive team with the ability to use a tight game if they need to."