Napoli contemplated signing Neymar for a few months in the second half of last season but ultimately didn't pull the trigger.

Napoli Gave Some Thought to Signing Neymar Last Summer

Napoli contemplated adding Neymar for a few months in the second half of last season. Then, in the thick of it, when they really started planning their transfer market moves after Antonio Conte confirmed he would stay, they didn’t pull the trigger. Kevin De Bruyne falling into their lap ended the interest.
Roma are about to see Marcos Leonardo, whom they chased until the last moment in the summer, join another team, as Benfica are very close to acquiring him.

Roma Now Lagging Behind in Race to Sign Marcos Leonardo

Roma came within a hair’s width from acquiring Marcos Leonardo last summer. Santos ultimately decided to keep him as they had already sold other talents and were struggling in league play. The Giallorossi were very confident about the purchase being simply postponed after deadline day, but their optimism has progressively waned.
Considered one of Brazilian football’s hottest prospects, Leonardo is contracted with Santos until December 2026, and is expected to depart soon.

Roma Great Dubious About Marcos Leonardo Coming Over

Marcos Leonardo was very close to joining Roma last summer, but a few factors impeded him from switching sides. Giallorossi icon Aldair is skeptical the move will come together in the future either: “I don’t think the transfer will happen. He’s very good. There was a lot of chatter last summer."