Rio was asked by a football fan on Twitter which number six Manchester United shirt he should buy this summer to which Ferdinand jokingly replied Declan Rice.
West Ham fans didn’t see the funny side with one replying “C’mon Rio you are a West Ham boy. Bad enough with Chelsea banging on about having him. Leave him be”
Other comments that are repeatable just said “Shut up, Rio” or “Bit disrespectful to the club where it all started for yer.” and “I used to like you. So disrespectful”
Our own Allen Cummings also replied on Twitter by adding “Total lack of class from Ferdinand! Disrespectful to Declan Rice and the club that shaped your career.”