Beckham earned his 109th cap against Slovakia on Saturday but his future opportunities may be limited due to the fine form Aaron Lennon has shown.
“Everyone wants to start for England, but at the end of the day, everyone also wants to play for England,” said Beckham.
“Substitutes can be very important. We saw that at Manchester United in the 1999 Champions League final with Teddy Sheringham and Ole Gunnar Solskjaer.
“Sometimes substitutes come on and can help secure a game, or change a game. I was happy with getting on and happy with the assist.
“It is what I have done for my whole career, and if I get a chance there are players like Wayne Rooney, Emile Heskey or Peter Crouch to get on the end of it.
“If I start, then I start. If I don’t, then I am part of the team – a good team which is going forwards.”
