The Ivory Coast international is off contract next month and unsure whether he will be staying at Stamford Bridge.
"I'd love to play again at Feyenoord. Maybe in a few years. Maybe earlier. They may call me. They are the first on my list," Kalou told NUSport.
"Now football is work for me, I have had six years of hard work, I have grown wise, I know what's good for me.
"Let me win the Champions League first then I'll think about Feyenoord ... yes, seriously!"