Defoe remains optimistic Spurs can compete for a top-four berth as long as concentration levels remain high.
"It's going to be difficult with the other teams around us because its a strong league," he said. "But it's important to look at ourselves and just keep winning games, that's all we can do. We'll see what happens.
"It's well known that we've been conceding late goals but it was a fantastic performance from the lads today.
"It was difficult to concentrate towards the end they put us under a lot of pressure. It's something we've worked on during the week to be honest.
"Even though we've conceded late goals in the past we were confident of getting three points today."