Is this finally lift-off for Son's season?

DOUBLE: Tottenham Hotspur's Son Heung-min (left) and Preston North End's Ben Whiteman battle for the ball during the Emirates FA Cup fourth round match at Deepdale Stadium, Preston. Pic: Tim Goode/PA Wire

FA Cup Fourth Round: Preston 0 Tottenham 3 

Heung-Min Son hopes his superb double at Deepdale can finally give him - and Tottenham - lift-off in what has been a strangely inconsistent campaign.