BBC Sport senior football correspondent Sami Mokbel says those close to Southampton believe Tyler Dibling's time as a Saints player could be coming to an end.
On Wednesday, it was revealed the 19-year-old had been withdrawn from full-contact training by the Championship side.
Speaking on the Football Daily podcast, Mokbel stated that while some people closer to the Everton camp feel the deal has stalled, others suspect that there are still "legs" to it.
"The information varies depending on who you speak to," he said. "If you speak to people closer to Everton, they will tell you that the deal has reached an impasse and Southampton are asking for far too much.