By Dominic Toner

Heung-Min Son may have to return to South Korea to complete mandatory military service, according to a report.

Son has emerged as a key player in Mauricio Pochettino’s team, scoring five goals in his five matches for the club this season.

The Telegraph report that the Tottenham attacker may be forced to return to his nation and complete at least 21 months of military service, which must be done before the age of 28.

The report details that the Son, who turned 24 in July, could play abroad until July 2019 and would be able to earn exemption from the service if he helped South Korean win the 2018 Asian games.

It is said that current conscription laws stipulate that athletes and sportsmen who win medals in the Olympic Games or gold medals in the Asian Games are handed exemptions but are still required to do four weeks of basic training.

Son was a part of his national team that were eliminated from the men’s football at the Olympic Games in the summer, after losing 1-0 to Honduras at the quarter-finals stage.

Should Son be called to fulfil his military service, it is unlikely he would be a soldier with most professional footballers instead playing for the military team.

Such is the sensitivity of the issue in South Korea that Son ducks questions about military service and information from his home country about the laws regarding conscription constantly change.

The Telegraph report that while Spurs are well aware of the rules, the club are largely in the dark over whether or not the military service is likely to be completed while he is their player.

The Spurs winger is currently under contract at White Hart Lane until 2020 and is enjoying a purple patch of form.

Mauricio Pochettino handed Son his first competitive start of the season against Stoke in the Premier League and he grabbed his chance with two goals and an assist.

He has continued his run in the side and netted the two decisive goals in the 2-1 win against Middlesbrough on Saturday.

Son also scored the winner against CSKA Moscow on Tuesday night as Spurs won the Champions League game 1-0.

In other Tottenham team news, Steve Archibald has given his Twitter verdict on the magnitude of the victory against CSKA.