Portugal's opening Group K match ended in a 1-1 draw with DR Congo, with Joao Neves's early header being cancelled out by Yoane Wissa late in the first half.

In the aftermath of the result, it was captain and all-time leading goalscorer Ronaldo that received much of the criticism.

Ronaldo has now gone 10 consecutive games without scoring a goal at major tournaments for Portugal, the longest run of his international career. 

His most recent goal in either a FIFA World Cup or UEFA European championship was against Ghana on matchday one of the 2022 FIFA World Cup in Qatar, which came from the penalty spot.

His most recent goal in open play in either competition was at UEFA Euro 2020, when he netted twice in a 2-2 group-stage draw with France.

But Dias claims that nobody in the Portugal camp was fazed by the criticism received.

"The criticism is not significant for us; it's noise and part of the competition," he said.

"It's all noise. It always happens if you have a match that doesn't go well. We're closing ourselves off from unnecessary criticism.

"Cristiano, of course, is used to dealing with the media pressure we usually face at our clubs, with the national team, at world tournaments and in European competitions.

"In this sort of competition, it will never be perfect. This is a competition you can win ⁠only if you play well game after game."

Portugal's next game sees it face Uzbekistan on Wednesday (AEST), and anything less than a victory will leave it in an extremely difficult position to qualify for the knockout stages ahead of taking on Colombia.

"I come from playing most of my club matches against teams that use a ⁠back five, so I have a very clear idea about it," Dias said about the prospect of Uzbekistan sitting deep.

"I believe we have players with enough quality that, by respecting our positions and making the right decisions, we can make the difference."