The Italian, then 51, won the Premier League title and the FA Cup with Chelsea in 2010.
The midfielder was sent on just moments before the end of the Europa League final against Eintracht Frankfurt.
The centre-back made eight appearances for the Gunners after his arrival at the start of 2018.
Joe Aribo put the Rangers fans in dreamland when he slotted home following a slip in the German side’s defence in the 57th minute.