Kanu scored the winning goal against Bolton on Saturday.
“That was my first league goal this season and although the most important thing is that we won, it is difficult for me when I have not been playing, or coming on with ten minutes to go,” said Kanu.
“I scored the winner in the FA Cup final a year ago and also in the semi-final. But this goal could be just as important because I don’t know what my future is.
“I love Portsmouth and I want to play for them. I know how to play football so if I get the opportunities I can still play.
“Maybe this was a little reminder to the manager but we have a good squad here so it is a case of just awaiting my chance to play.”