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Villas-Boas' rotation of his defense has been partly necessitated by injuries, but mostly it has served as a way of giving one or two of the group a rest at a time while getting a good look at whoever has played.
The Spurs boss has some quality defenders to choose from, something that was not always apparent in their failure to organise themselves adequately and the subsequent goals that cost them.
It is to the credit of all parties concerned that they have made a concentrated effort to improve here, and the hope will be they can maintain this greater level of focus for the remainder of the campaign.
The back four against Reading (Walker-Dawson-Vertonghen-Naughton) performed well overall, but there were a few situations they found themselves caught out, and not by particularly inspired Reading attacks either.
This happens sometimes, however with plenty of tough fixtures coming up Spurs could do with minimising any potential reasons for the errors that previously plagued them.
Establishing a preferred defensive line-up would aid these attempts considerably.
Having used virtually all of his available options recently (and with others like Benoit Assou-Ekotto due to come back), Villas-Boas will likely have a good idea of who he would like to proceed with—which names they will be remains to be seen.