Andre Villas-Boas will not consider remaining as Zenit coach beyond this season despite his success.
Villas-Boas has been a big hit in Russia, with the 2-0 win at Lyon on Wednesday night securing his side's progression to the last 16 of the Champions League with two games to spare.
Asked whether the continental success - Zenit are the only side with a 100 per cent record in Europe's premier competition - makes him reconsider his position, Villas-Boas revealed that being away from his family is too difficult.
The Portuguese boss told the club's official website: "At different moments in different situations I get asked these questions.
"I am very happy to be coach of the Zenit, but you know that my family lives in Portugal, and it is not easy."
He added: "I am particularly pleased that we have reached the [next round]. It is important for the Zenith and Russia in the UEFA coefficients table."
