The Russian giants announced Sergio's signing yesterday after he had completed his medical.
The 26 year-old defender moves to Spartak for a €400,000 fee.
Sergio has penned an initial 12 month deal.
Tribal Football Staff are dedicated to the football tribes from all over the world. Our team is passionate about delivering football news to our hundreds of thousands of followers in all the corners of the globe. Football is life, It never stops, Neither do we.