Nathaniel Clyne hopes to have given England manager Roy Hodgson a headache after impressively replacing in-form Kyle Walker against Slovakia.
The six changes made in St Etienne backfired on Monday as a goalless draw allowed Wales to usurp the Three Lions and finish top of Group B.
Among the disappointment was a few impressive performances, though, and right-back Clyne shone, bombing down the flank and defending when necessary.
It was an impressive display in place of Tottenham full-back Walker - named man of the match in two of the previous three England games - and could give Hodgson a selection dilemma.
"I was pleased with my performance," Clyne said. "The manager made changes and we all came in and done well.
"We dominated the game from start to finish. It was a bit frustrating that we didn't get the goal which would have won us the game.
"He's done really well, all of the starting line-up that's been playing have done well and this was a chance for those coming in to show the manager that they should be in the team.
"It's good that everyone is fighting for positions, makes the team healthy, makes everyone push harder."
Clyne promised to keep working hard and taking his chances, although Walker may well come back in for Monday's last-16 clash in Nice.
Portugal, Hungary, Austria or Iceland lie in wait after the Three Lions wasted the chance to face a third-placed side in Paris this weekend, just 34 miles from their Chantilly base.
"I suppose that would have been ideal for us to play more local but I think it'll be exactly the same feeling if we play further away," Clyne said.
"We've got one job to do and that's to win the game and that's it."
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