Beckham, who came on for Theo Walcott at the Maksimir Stadium this week, said: "I don't care if I play or not. As long as England win, that is the biggest thing for me.
"I'm happy to get on in the last two games and I'd have loved to have played more in both.
"I'm happy to be part of the squad and get as many games as possible. I don't expect to be in every game, that is the way it is.
"At the end of the day it's all about the team, the squad, and England qualifying for the World Cup.
"I'm part of the squad, happy with the team and the two results. "It's six points out of two games so whether I play or not is immaterial. The biggest thing is if England win."
Beckham feels it was a matter of time before England produced a performance like they did against Croatia - and Capello will now ensure that standards do not drop.
He added: "Someone said that we've turned a corner but we felt like that before the game, so the performance didn't really surprise the players. But it's put us on a good platform.
"We as a team are not getting carried away but we'll be happy with the result. The way we performed was the biggest thing. We have a lot of level-headed lads who will be pleased but we will not get carried away.
"It's a chance for us to take this on because we want to carry on going forward. We don't want to take a step back. The manager won't let that happen anyway."