Inter have formalized an offer of €17 million plus €2 million in bonuses to Hertha Berlin for Valentino Lazaro, according to Gianluca Di Marzio.
The German club, however, are asking for €20 million to close the deal.
Paris Saint-Germain and Arsenal are also interested in the 23-year-old Austrian midfielder.
Inter could raise their offer and close the deal for Lazaro next week having already agreed personal terms.
Lazaro registered three goals and six assists in 31 Bundesliga appearances last season.