According to the Sky Sports mercato expert Gianluca di Marzio, Inter is one of many clubs that are interested in Robert Lewandowski from Dortmund:

“Lewandowski costs 25 million euros and will be one of the hottest names for the transfer session in summer since his contract expires 2014. Juventus, Milan, Inter and United are all interested in him.”

Source: Fcinternews.it