Manchester United manager Jose Mourinho was spotted watching Serbia's clash with Montenegro in midweek, and may well have been completing a scouting mission.
United have been heavily linked with Sergej Milinkovic-Savic, the Lazio midfielder who has also reportedly attracted interest from Real Madrid and Barcelona.
Despite performing somewhat poorly thus far this season, Milinkovic-Savic featured as a substitute against Montenegro in the UEFA Nations League clash, with Serbia running out 2-0 winners.
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A brace from Aleksandar Mitrovic, himself in fine form for Fulham, handed Serbia a historic win, in a game that marked the first time the two nations, who competed as one in the 2006 World Cup, have met competitively.