Former Manchester United star Rio Ferdinand made a secret return to Carrington last week to visit his old team. It was an interestingly-timed visit too. Rio Ferdinand visited Carrington just hours after his video with Cristiano Ronaldo was released, in which the iconic former star took a little dig at manager Erik ten Hag. Speaking to Rio Ferdinand Presents, the club legend admitted the timing did put him a little on edge. Ferdinand said that once he walked through the doors at Carrington, he quickly became aware the club had ‘bigger fish to fry’ and Ronaldo’s words were treated as ‘just anoth…