The phrase "already emphasized" is correct and usable in written English.
It can be used when referring to something that has been highlighted or stressed previously in a discussion or text.
Example: "The importance of teamwork has already been emphasized in our previous meetings."
Alternatives: "previously highlighted" or "already stressed".
"We have already emphasized many times that we request the Philippines investigate thoroughly, punish those responsible and give the fishermen a satisfactory response," said the spokesman, Yang Yi.
Kripke recently wrote to me, "The comparison of my views on the transmission of proper names with photographs is already emphasized by David Kaplan in his 'Quantifying In' (Synthese Vol. 19, No 1/2 (Dec., 1968), pp. 178-214).
Santander UK's chief, Ana Patricia Botin, had already emphasized in an interview with the BBC this month that the timing of such a move was crucial and that "right now is probably not the best time".
Maybe, although there's very little evidence that this would be important — and as I've already emphasized, you should also take the positive effect on the economy, and hence on revenue, into account.
It was essentially a restatement of a counterinsurgency concept already emphasized by President Obama: the idea that success in Afghanistan depends on political strategies that weaken the Taliban, including luring insurgents to quit or switch sides.
That point was already emphasized in Tylor's seminal definition.
He noted that Mitt Romney's campaign was already emphasizing the economy at every opportunity.
Mr. Biden is already emphasizing his mantra for audiences: "Tell your congressman".
But, he quickly added, he already emphasizes to students that the political playing field tilts here and there.
The loss of Serena Williams from this year's United States Open will be a tough one for the tournament to absorb, but its promoters are already emphasizing new angles.
In fact, our recommendations and public information already emphasize the benefits and harms of various screening tests based on the best available scientific evidence.
