'Sonny' struck two fine goals to help us to a 2-1 victory at the Riverside Stadium back in September. The second was a real beauty as he drove into the box on the left, seemed to run out of room, cut back on himself and pinged a curler into the top corner.
Earlier that month, the South Korean star also claimed two goals at Stoke City - and his four-goal haul earned him the Premier League's EA Sports Player of the Month for September, becoming the first Asian player to win the montly accolade.
"It's always good to score and I really enjoyed those goals at Middlesbrough," Sonny told us this week. "I always try to give my best in every game and sometimes I score, sometimes I don't, but working hard for the team is the most important thing.
"Middlesbrough will be another tough game on Saturday but it's very important we keep in our minds that we are strong at the Lane and of we show the right mentality and character, then I'm sure we can get the result."