Defoe is Spurs' top scorer this season despite seeing his chances limited due to the presence of Emmanuel Adebayor and Louis Saha.
"I’ve felt sharp all season to be honest and I’ve always said when you play in a team like this you’re going to get chances so it’s down to the forwards like me to take them," Defoe told ESPN.
"Obviously [a call-up to the England squad is] at the back of my mind. That’s only normal with a tournament in the summer. I’ll keep doing what I’m doing for Tottenham and we’ll see what happens.
"Everyone wants to get a run in the team, it’s difficult we’ve got a big squad. The manager knows if called upon, I’ll be ready. All I can do is do what I do best and that’s score goals."Gareth Bale was also full of praise for Defoe and backed the striker to hold down a regular place in Harry Redknapp's line-up.
The winger also had kind words for their League One opponents after a tough game at White Hart Lane with Bale and Defoe combining for both of the striker's goals.
"[Defoe] seems to do it every time he comes on, every time he gets a chance he’s taken it," the Welshman said. "He’s been unlucky but hopefully he can get his chance now and keep us going in the Premier League.
"We all knew how hard it was going to be from the game at their place. They gave everything they got and gave us a hard time but in the end we started our passing game and that’s how we finished them off."