Sunderland defender Paulo da Silva has no doubt Paraguay teammate Cristian Riveros can make a big impact on Wearside.
Da Silva certainly thinks that his friend has the ability to make a big impact this season.
"Cristian played well in his first game and he has been good in training - he has shown us what he can do," Da Silva told The Journal.
"There are normal things for him that will take time - like learning the language, getting used to the city and settling with his family.
"But he is strong and a good character - and he will be a good player for Sunderland."