The England international has acted as back-up for Ashley Cole over the past two seasons as the left-back failed to dislodge his senior team-mate.
Bertrand said: “I have been on loan four or five times but then there comes a time when you have to say, ‘Right, I am going to spend some time back at the club and see what happens.’
“Obviously I want to be Chelsea’s No1 left-back, and when that time comes it will happen.
“All I can do is be ready and keep playing, keep biding my time.
“I just concentrate on progressing in the games I get, and I’ve managed to do so in recent years. That’s the only target I have.”