Marcus Rashford told ESPN that Jadon Sancho could be a "big factor" for England in their Euro 2020 round of 16 match against Germany on Tuesday.
Sancho has spent four years playing for Bundesliga giants Borussia Dortmund and has played with and against several German players in Joachim Low's squad.
The 21-year-old has only performed in the later stages of England's group stage win over the Czech Republic, but Rashford said the forward could play a bigger role in the match at Wembley.
Asked if Sancho could be England's most valuable asset in the sport, Rashford told ESPN: "In a way yes, because he's played a lot more football against them than the rest of us.
“I am sure he knows the players, their characteristics, strengths and weaknesses and he is definitely someone who can take advantage of them. If one thing doesn't quite work out we have to change things up and adapt to the game is a great opportunity.
“Adaptability is one of the greatest skills in football and there are times in sports where you have to change or change something in order to hurt your opponents. The fact that he played against them a lot has also made them very hurt, that would be a big factor for us."
Rashford and Sancho could also be club teammates next season, with sources telling ESPN that Manchester United are closing in on a deal to sign the Dortmund winger this summer.
Man United has already admitted he may need a shoulder operation this summer, which he could miss at the start of next season, but is focused on playing a role for England.
England have failed to progress to the quarterfinal stage at Euros since 1996 when they hosted the tournament and were knocked out in the semi-finals by eventual winners Germany.
However, Rashford said this group of players would show no fear after playing big games on a regular basis - players from United, Manchester City and Chelsea were involved in the European final last season.
"Young players have played so many big games at their club and that's a big factor in the case of international football because when you play for your country every game is a big game," he said.
"They all just step into it and have no fear and that's important. Because of that, inexperience doesn't really come into play and isn't a factor in their performance.
"It's a big difference that's been happening in the last two or three years. A lot of players at club level have been involved in big games and eventually they have been exposed in must-win games and international football, that's every sport. is."