Watford are watching RB Leipzing winger Matheus Cunha.
BILD says a raft of European clubs are chasing Cunha for this month's winter market.
The Hornets, Real Betis, St Etienne and Nantes are all keen.
The Brazilian can pay on the flank and also as a central striker.
While the French duo are in contact with Leipzig, there's an acceptance that Watford and Betis head the queue for Cunha due to their greater spending power.