Andre Villas-Boas has turned up the heat on this weekend's London derby by admitting he "doesn't lose any sleep" over his broken relationship with Chelsea manager Jose Mourinho.
The Tottenham manager worked under Mourinho during the 50-year-old's first spell in charge of Chelsea, but their relationship became fractured over time and Villas-Boas moved on.
He eventually became Chelsea boss himself in 2011, but was sacked after an ill-fated eight months at the club before 'the Special One' returned to the hot seat this year.
And as he prepares to welcome Chelsea to White Hart Lane this Saturday lunchtime, the Portuguese boss revealed he and Mourinho are no longer on speaking terms.
He told the Daily Mirror: "We had a great personal and professional relationship before that we don't have now.
"I don't think we need explanations on friendship and personal relationships. But our relationship broke down.
"I think we have the mutual respect for each other, and we understand what we have been through cannot just disappear, but it's not like it was before.
He added: "We don't talk now. We talked at the Premier League managers' meeting in August, but not since then. I don't lose any sleep."
Villas-Boas' Tottenham side have started the campaign in impressive form and are level with Arsenal at the top of the league after the opening five fixtures.
His compatriot Mourinho has not had such a promising start with Chelsea, however, having been defeated by both Everton and Swiss side Basel so far.
Defeat against their bitter London rivals would be the Blues' fourth defeat this season, but Villas-Boas has insisted that he has no interest in gaining revenge on his former employers.
He said bluntly: "I don't care about Chelsea, it's not my responsibility."
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