Inter Milan coach Jose Mourinho and Juventus counterpart Claudio Ranieri clash for real on Saturday after a number of verbal spats between the former Chelsea bosses. The pair are far from being best of friends given their recent past, differing styles and their clubs' Serie A rivalry.

Ranieri built up a decent Chelsea side only to be sacked in 2004 and watch Mourinho take over and lead the London club to two Premier League titles.

The debate about how much credit each man deserved for Chelsea's success rumbles on and almost as soon as Mourinho arrived at champions Inter in June, a personal feud began.

The charasmatic and direct Mourinho constrasts markedly with the avuncular and calm Ranieri. Mourinho has criticised Ranieri's knowledge of English and accused the 57-year-old of being too long in the tooth among other jibes.

Ranieri has mixed views about his rival.

"I don't like it how he creates controversies," he said. "I like the fact all players say good things about him - it shows he has a good relationship."

The long rivalry between the clubs, who have consistently battled against each other for the Italian title, is just as intense and if not more so than the Milan city derby. Inter versus Turin-based Juventus is called the "Derby of Italy".

Anomisity between the clubs worsened in 2006 when Juve were stripped of the title and demoted in a match-fixing scandal, leaving Inter to be awarded the championship in a court room.

If that did not anger Juve fans enough, Inter signed Zlatan Ibrahimovic and Patrick Vieira from the then-Serie B club.

Saturday's match at the San Siro is given extra spice because third-placed Juve, on the back of seven straight wins in all competitions, can move level with the leaders with a win.