Andre Villas Boas is on the brink of becoming Chelsea's new manager after tendering his resignation as Porto coach.
Porto confirmed the news to the CMVM (Portuguese stock market) following reports from the Lusa news agency that the 33-year-old quit via fax.
Villas-Boas will officially leave his position once the terms of his release clause, 15 million euros, are met by prospective employers, Chelsea.