I have a strong relationship with Ronaldo, says Portugal coach Santos

advanced into the

quarterfinals with an emphatic 6-1 victory over Switzerland on Tuesday.

started the game on the bench and Goncalo Ramos who replaced him scored a hat trick.

In his pre-match press conference, Santos criticised Ronaldo's reaction following his substitution against South Korea.

After the game, Santos said there is no problem between him and Ronaldo and they have a good relationship with each other.

Santos told reporters:

"That's still something that has to be defined [who starts in the next game]. I already answered in yesterday's press conference [regarding Ronaldo]; there is no problem between us.

"I have a strong relationship with him, I always have. I have known him since he was young and at Sporting [CP], and then it started to develop in the national team.

"This relationship only developed. We've been friends for many years, things don't affect us.

"I already explained everything was resolved. I said that and I repeat that now. This is something that's finished and resolved.

"How he came in with a lot of will, he set an example as a great captain."

Ramos become the first player to score three goals on his first World Cup start since Miroslav Klose in 2002 but Santos did not rule out putting him on the bench in the next match.

"Obviously I have my ways to observes things, I always have,"

he continued.

"The players we have in this position obviously have many different characteristics.

"Andre [Silva] plays more advanced, Cristiano is more fixed, he plays in a determined area. Goncalo is dynamic.

"That's what he ended up showing us, but it was nothing new because he came on in two other games.

"I have three players I fully trust and for each match I will use what I think is the right strategy, as I have always done in my career."

This was Portugal's biggest-ever victory in the knockout stage of the World Cup. It was also the first time Portugal scored six goals beyond the group stage.

Portugal will face Morocco in the quarter-finals on Saturday.

"It's exactly what I said [to the players]; when we are euphoric, I think we can go beyond what we should do in a match.

"We can end up having a bit too much fun, to use that expression, and football is not fun. Yes, you have to play, have fun in the field, but too much fun is not appropriate.

"In this aspect, in terms of how serious they were, they were fantastic."

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