Fredy Guarin had all but signed for Juventus when the deal was cancelled with fan protests playing a part in Inter chief Erik Thohir's decision and that could have set a precedent.
Colombian midfielder Guarin is one of Inter's most exciting talents and the prospect of losing him to bitter rivals Juventus led to the release of an angry statement from the Nerazzurri's Curva Nord and a social media campaign to prevent the sale.
Indonesian owner Thohir hasn't been at the club for long and it appears that when facing such an outpouring of anger, he backed down.
Now it seems that fan power may strike again as Lazio supporters are allegedly plotting to protest against the likely sale of Brazilian midfield star Hernanes to Inter.
Lazio chief Claudio Lotito had warned it would require an 'indecent offer' to sign Hernanes, but it seems Inter have tabled that offer.
While Lazio are holding out for £13m, it appears that an agreement is close, but La Gazzetta claims that Lazio owner Lotito is worried there could be an angry reaction from the Lazio fans.
It has been suggested that fans will attempt to exert the same kind of pressure that Inter's put on Thohir, but success seems less probable against the notoriously stubborn Lotito, who has soaked up a significant amount of hostility in his time.
The next few days will give an intriguing insight into whether Inter's supporters have started a fan power revolution or whether it was merely a one-off incident.
image: © batrax