The 28-year-old has never been a nailed-on regular at Madrid and such is the case under Zinedine Zidane this season, with the diminutive Spaniard featuring from the start on just four of a possible 12 La Liga games so far this season.
Vazquez has spent almost his entire professional career doing so, except for a loan stint at Espanyol during the 14/15 season.
Valued at around 20 million euros (£17 million), his sale could provide funds for Zidane to dip into the transfer market.
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