Roma have control of their last-eight tie with Ajax after a second-half turnaround was capped by Ibanez's incredible volley.
Wojciech Szczesny made a costly error on Saturday, but the Poland goalkeeper remains ahead of Gianluigi Buffon.
Milan are reportedly ready to pounce for Napoli captain Lorenzo Insigne.
Antonio Conte insisted securing the victory was all that mattered against Sassuolo after Inter recorded just 30 per cent possession.
Paulo Dybala was Juventus' matchwinner against Napoli and Andrea Pirlo hopes to see him extend his stay at the club.
SPAL 1-2 Juventus: Ronaldo scores again on his 1000th appearance