POLL:Who is the greatest Chelsea player ever?

Chelsea legend Frank Lampard announced his immediate retirement from playing football on Thursday, at the age of 38.

Lampard & the 20 greatest Chelsea players of all time

The midfielder last played for New York City FC but saw his contract expire in the summer after helping Patrick Vieira's men to the Eastern Conference semi-finals, where they were eliminated 7-0 by Toronto FC in the play-offs.

Former England international Lampard had recently pondered the topic of retirement in an interview, stating he was reluctant to leave the game too soon for fear of regrets.

So we ask you whether you think Lampard was the greatest player ever for Chelsea. Or was it someone else. Have your say!