Watford allowed Dodi Lukebakio to join Fortuna Düsseldorf on a season-long loan deal last summer and the forward has impressed during his time in Germany.
The Belgium U21 international has 10 goals and three assists in the league and four more goals in two DFB Pokal appearances this term.
According to Bild, the 21-year-old’s market value was €5m before he arrived at the German club and it’s now doubled to €10m following an impressive campaign with the Bundesliga outfit.
The attacker’s current market value makes it difficult for Fortuna Düsseldorf to secure his services on a permanent transfer, but the player himself has not ruled out a surprise move.
Fortuna manager Friedhelm Funkel has also expressed his desire to retain Lukebakio. Funkel said: “Another year with us would be good for him.”
His contract at Vicarage Road will expire in 2022, but Kicker reported last month the Watford owned forward ‘does not want’ to remain with the Hornets.