Porto president Jorge Pinto da Costa claims new Chelsea boss Andre Villas-Boas is obsessed with Jose Mourinho.
Da Costa remains unhappy with Villas-Boas' decision to quit Porto last month.
"He has a complex and is always thinking about the ghost of Mourinho. How Mourinho won the UEFA Cup and Champions League, he refused to continue here because he was afraid of not doing the same," said Da Costa to O Jogo.
"I told him as president and a friend, he should stay another year at FC Porto.
"In football, when you think about a big European club, the gauge is not Chelsea, it is Real Madrid, Barcelona or Manchester United."
