South Korea international Hyun-seok Hong is attracting growing interest across Europe, with Belgian champions Union Saint-Gilloise reportedly entering the race for his signature following an official bid from Ligue 1 side FC Nantes.

According to Tribune Nantaise, Nantes have submitted a firm offer to Bundesliga outfit Mainz for the 26-year-old attacking midfielder. Hong has struggled for regular playing time in Germany, falling behind rising star Paul Nebel and fellow Korean international Lee Jae-sung in the pecking order. A move away now appears increasingly likely.

Hong, who previously impressed during his time in Belgium with KAA Gent – registering 18 goals and 20 assists across 104 matches – is now being closely monitored by his former league rivals. Reports from TransferFeed and Foot News in Belgium suggest that Union Saint-Gilloise, fresh off their domestic title triumph, are weighing up a move as they rebuild their squad following several summer departures.

While Nantes remain firmly in the hunt as they look to bolster their midfield amid a major squad overhaul, competition from Belgium could intensify in the coming days. Union SG are said to be actively exploring options in attacking midfield, with Brest’s Kamory Doumbia also on their radar.

For Hong, the prospect of a return to familiar territory in Belgium — where he enjoyed arguably the most productive spell of his European career — could prove tempting as he seeks to revitalise his momentum ahead of a pivotal season for club and country.