Spain face France in a blockbuster semi-final at Dallas Stadium on Tuesday, with Porro insisting there is nothing to separate the two sides at this stage of the competition.

The Tottenham Hotspur full-back said he has developed significantly over the past year after gaining valuable experience through regular football.

"I'd say I have a lot more experience now," Porro said. "In a year you play around 50 more matches and that helps you grow. Every game teaches you something different. More than feeling ready, I feel much more experienced."

Spain have travelled extensively throughout the tournament, but Porro said it has not affected the squad.

"Personally, no," he said. "People can see how much we've travelled, but we don't really think about it. We recover well after every game and now all our attention is on the semi-final."

Porro also praised Spain coach Luis de la Fuente for creating a close-knit dressing room and making every player feel valued.

"Luis is a fundamental figure for us," he said. "He's the one who created this family atmosphere. From the first day, he made me feel important whether I was playing or not. That tells you a lot about the kind of person he is."

The defender explained that his role changes depending on the opposition, with different matches demanding different responsibilities.

"It depends on who we're playing," he said. "Sometimes you need to attack more, sometimes you have to defend more. Against Belgium I was able to get forward for the first goal, but after that my main job was to stop Jeremy Doku. Every opponent is different."

Porro admitted reaching a World Cup semi-final is something he only dreamed about as a child.

"I was very young when Spain won the World Cup in 2010," he said. "The main memory I have is being in the bath when they won and then celebrating afterwards in Plaza de Espana. Now I'm getting the chance to play in a World Cup semi-final myself, which is another dream come true."

Despite Spain's impressive form, Porro rejected any suggestion that his side are favourites against France.

"There are no favourites at this stage," he said. "These are two great teams. It will be a fantastic and very difficult semi-final, and we hope we can come out on top."

He added that facing one of the tournament's strongest teams only increases Spain's determination.

"Playing a World Cup semi-final is always special, whoever the opponent is," he said. "But France are one of the strongest teams here, so that gives us even more motivation. We'll be ready."

Porro also reflected on how quickly life has changed over the past six weeks.

"Forty days ago I was on holiday with my wife and children," he said. "Now I'm one match away from a World Cup final. I'm very happy. I don't pay attention to what's being said outside. I just focus on giving my best, and I'm sure my family is proud."

Looking at Spain's progress under De la Fuente, Porro believes the team's unity has been the biggest reason behind their success.

"We've stayed together," he said. "We've worked together for a long time, we've played a lot of matches and we understand each other better all the time. We approach every game as if it's a final. That's our mentality."

Pedro Porro believes Spain's 'strong unity' can beat France and reach World Cup final