The Italian worked with Ranieri at Juventus a few years ago and took to social media on Monday to wish his former manager well after it was confirmed the Foxes have qualified for Europe next season.
Leicester still have the small matter of the Premier League title to fight for, of course, sitting seven points clear of second-placed Tottenham Hotspur with five league games to go this season.
But they have already achieved European qualification for next term:
Leicester are now huge favourites to win the Premier League, of course, and have been on an extremely impressive run.
Their remaining fixtures aren't easy, however. Next up is a home clash against West Ham United - a tricky tie.
Home games against Everton and Swansea City should be easier, while trips to Old Trafford and Stamford Bridge should prove tricky.
Considering Leicester's form, all five are very winnable. But Ranieri would no doubt swap them out for five more games against yesterday's poor Sunderland side!