Manchester City defender Micah Richards poked fun at a fellow Twitter user after he was asked when he will retire from playing.

The 25-year-old posted a message on the social networking website paying tribute to Craig Bellamy, who announced his retirement from football yesterday.

He wrote: "Honoured to have played with Craig Bellamy from his time at city. Great pro in training and class player! Good luck in the next chapter."

With Richards's own long-term future being up in the air, one Twitter user opted to cheekily ask when the defender will be retiring.

In response, Richards said: "When u start puberty."

@nanikhan90 when u start puberty 😛😛😛

— Micah Richards (@MicahRichards) May 22, 2014