The Blues agreed a £40m deal for the 18-year-old Atalanta defender on deadline day, but he will not officially become a Chelsea player until June 2027, spending this season on loan at Crystal Palace in the meantime.
Premier League rules prevent a club from immediately loaning a player it has just signed to another top-flight side within the same window, so Chelsea structured the deal as a pre-agreement, with Ahanor remaining registered to Atalanta until next summer.
It mirrors the mechanism used to send Axel Disasi to Palace for the rest of this season, allowing Chelsea to place a second player at Selhurst Park despite the usual restrictions.
Chelsea are expected to closely monitor Ahanor's progress at Palace before deciding on his long-term role, with a further loan elsewhere not ruled out depending on how he develops.
Speaking to Tuttosport, Riso praised the structure and scale of the deal from an Italian football perspective.
"For Atalanta, it is undoubtedly a great operation," he said. "But if such a young boy reaches such an evaluation, it also means that even today in Italy, we have talent and know how to cultivate it.
"The fact that they stay here is not central, especially if their destination is the Premier League, a league I have often described as the NBA of football and which, as such, can certainly contribute decisively to their growth.
"It is highly challenging and returns them stronger to our national team. The real challenge for Serie A is to create the conditions for these guys to grow up here, before having to sell them."
Riso also represents Sandro Tonali, who completed a £100m move from Newcastle to Tottenham this summer in a deal that set a record fee for an Italian player. Asked about the transfer, the agent was quick to credit his client rather than his own negotiating skills.
"There are many years of work behind a deal like this. I'm not the one who set the record: Sandro deserved it on the pitch. At most, I made a few more phone calls," Riso said. "Tottenham is a club that had a very clear idea of Sandro. When a club makes you understand that a player is a priority, everything becomes easier."
Discussing the increasing complexity of modern transfer structures, including loans, conditional obligations and resale clauses, Riso defended the trend as a necessary response to financial regulation rather than a sign of weakness in the market.
"To make a transfer today, you need mental flexibility and preparation, as well as a good dose of imagination," he said. "To achieve a sustainable balance, the football system has imposed limits on itself, which clubs sometimes require longer and more complex processes to respect. I would call it financial creativity in the positive sense, that is, aimed at rebalancing the system in the medium to long term, which can't be done overnight."