Another injury blow for Tottenham? Son Heung-min admits he 'felt pain' during South Korea's World Cup qualifier against Singapore as Premier League title hopefuls' fitness concerns mount up

Son Heung-min admitted that he "felt pain" during South Korea's World Cup qualifier against Singapore as Tottenham's fitness concerns mount up.Article continues belowArticle continues belowArticle continues belowSon scored in Korea's 5-0 routBut sustained a knee…