The Portuguese joined Chelsea at the beginning of the 2011-12 season with increasing esteem after guiding his Porto side to a league, cup and Europa League treble the previous year.
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Wenger opined to Arsenal's official website: "He has done well. I think he has done well.
"For the rest, I don't know how life is on a daily basis [at Tottenham]. It is very difficult to assess that, but they play well.
"They are a good side. They have renewed a lot their team and they are doing quite well.
"Villas-Boas got a deserved second chance. Sometimes you get the second job because you got the first one.
"For example, it would have been maybe more difficult to get the Tottenham job if he had not had the Chelsea job before because people could watch him and see what he has done and speak to players who have worked with him.
"So, you have bit more of a guarantee than just importing someone from Portugal."