Theo Walcott claims England's win over Spain shows they do have strength in depth to rival the best in the world.
England went into Saturday's game with the world champions with captain John Terry on the bench alongside Gary Cahill.
Star-striker Wayne Rooney was left out of the squad as he will serve a three-game ban at Euro 2012, while midfielders Steven Gerrard, Jack Wilshere and Ashley Young all missed the 1-0 win.
Walcott said: "A lot of players got who came in all took their chance. But that's what we've got in this England team. We've got so many great players in each position now.
"Tournament football, it's very important to have 23 very physically fit players and the players that came in did that and everyone's got to stay on their toes now."
England produced a backs-to-the-wall performance as Spain dominated the game, enjoying 70 per cent possession.
The Arsenal winger added: "Any Spanish team's always going to have the ball for periods of time. So you've just got to make sure that you don't switch off, try not to get frustrated as well.
"But you start to see a bit of frustration getting to the Spanish players - a couple of bookings - it wasn't quite happening for them because we kept on breaking them down.
"Obviously, we were limited going forward but the most important thing was that we got the win and there were a lot of positives to take out of it.
"Our back four were absolutely fantastic - but not just them. Players who came on fitted straight in.
"Sometimes, it changes the flow of the game when you make substitutions but everyone took their chance."
A man-of-the-match performance from Scott Parker confirmed his place as England's first-choice holding midfielder and Walcott singled him out for special praise.
"Everyone was fantastic but especially Scott. That's what Scott does," he said. "That's the sort of player he is. He's so experienced and he does help us out a lot."