Manchester United are watching Dinamo Zagreb striker Bruno Petkovic.
Index says United have had scouts posted regularly at Dinamo games to watch the 29 year-old.
Petkovic is a former Serie A player, where he played for Bologna and Hellas Verona.
He is also a current first-choice for Croatia.
Petkovic has a deal at Dinamo to 2025, with his club willing to sell for €5.5m.