Arsenal accepted a £60m bid from City for the Chile forward, 29, on deadline day in August, but the deal collapsed.
City planned to sign Sanchez for free when his contract expired in the summer but Gabriel Jesus’ two-month absence with a knee injury may expedite a deal.
“If he comes, he will add something to the team,” said the Belgium playmaker.
“He is a very good player,” added the 26-year-old. “Obviously we will see what happens.”