By Sean Walsh Tottenham Hotspur head coach Ange Postecoglou is not worried about Son Heung-min’s finger injury, insisting he will continue to play even if it comes off altogether. Son dislocated one of his fingers during a confrontation with international teammate Lee Kang-in while away with South Korea at the Asian Cup last month and has since been playing with it strapped up. The 31-year-old put in a standout performance in Spurs’ 3-1 win against Crystal Palace on Saturday, scoring his side’s third goal to put the win beyond doubt. In his post-match press conference, Postecoglou was asked if…