Tottenham Hotspur came from behind to beat West Ham United 3-2 on Saturday.
Son was brought on for Spurs in the closing stages of their match against West Ham in Saturday, when Mauricio Pochettino’s side were staring a defeat in the face.
However, the South Korean international’s desire to run in behind, helped Tottenham stage a late comeback.
Spurs grabbed an equaliser in the 89th minute when Harry Kane poked home from close range, but Pochettino’s side were not finished there.
Son showed great pace to get into the West Ham box in injury time, and he was taken down by Havard Nortdveit to earn Tottenham a penalty.
Kane duly converted from the spot to seal the three points for Spurs, and Ferdinand gave huge amounts of credit to Son for making such an impact.
“Son, I think he has gone unnoticed,” the former Manchester United defender said. “He came on and he’s changed the game.”
Tottenham’s win over West Ham has ensured that their unbeaten record remains in tact, after 12 games of the Premier League season.
Pochettino’s side are currently in fifth place, but they are only four points behind top of the table Chelsea.