Sơn, now a key part of the HCM City FC team, is keen to show his old club what they're missing.
Since arriving in Việt Nam in 2017, the South Korean coach has led Vietnamese teams to success in the continent and region.
A win, and only a win. That’s what Hà Nội FC’s young president Đỗ Quang Vinh wants from his team as the V.League 1 gets back in action on Friday.
HCM City FC is the most expensive football club in Việt Nam, according to Transfermarkt.
Midfielder Nguyễn Quang Hải has opened a community football centre in his hometown in Đông Anh District, Hà Nội.