Mashallah Karim!
Sardar has been needing to leave Russia for years now. I think Taremi's success in Porto may trigger him to want to do that even more now. Although in a better team than Zenit, he really needs to score on his chances. 1 goal out of 10 clear chances in a game is not good for his image in a bigger team with tougher fans.
Even though I like the idea of him playing for Sevilla much more than his current situation, I think he's got the capacity to play for a bigger club. If another Milan offer comes along, he should take that in a heart bit IMO!