According to widespread reports in Italy, Roma have failed to agree an extension of Smalling’s loan with Manchester United.
The Giallorossi are still in the Europa League and had hoped to keep Smalling, 30, for those games.
Smalling’s imminent exit does not completely rule out him returning to Rome next season.
Gianluca Di Marzio reports that the cash-strapped club could restart talks with United over a new deal.
Roma’s plan backfires
And his Sportitalia colleague Alfredo Pedulla goes into details on the financial aspects.
Several weeks ago, Roma had in principle accepted United’s requests for a new €3m loan deal with a €17m obligation to buy.
But playing on Smalling’s wish to stay, the Italians took the risky step of trying to reduce the price.
Roma are now willing to do the €3m loan deal but want to pay €15m in deferred payments for the eventual purchase of Smalling.
After it had seemed that Smalling would join Roma permanently several weeks ago, there are now differences between the clubs.
The England international had a fantastic season at the Stadio Olimpico, making 37 appearances for Roma.
If they fail to get Smalling back, Roma could turn to free agent Jan Vertonghen, but face stiff competition.