We take on the Black Cats in match one of the tournament at 6pm local time, 11am UK.
It's a repeat of our last fixture in the Premier League, when Paolo Di Canio's men made us fight all the way until Gareth Bale struck in the final minute for a 1-0 victory.
Now we meet at Hong Kong Stadium followed by Manchester City taking on South China FC.
"It's the perfect test for us against Sunderland and hopefully we'll go through to the final on Saturday," said Steffen, our Assistant Head Coach.
"We have two big games here in Hong Kong but remember, it's still pre-season and not just about results. The players have to build up their stamina.
"We want to play well in both games - we know they are live on television - but it's all about pre-season at the moment."