Midfielder loves first experience of the Premier League...
The 27-year-old came off the substitutes’ bench during his side’s 2-2 draw on Saturday and said he enjoyed every part of his first experiences on the pitch – having only arrived in England 24 hours before kick-off.
"It was amazing, the stadium, the pitch, the fans, everything was so impressive," Riveros told the club’s official website.
"When I came on the pitch, the reception I received was amazing from the Sunderland fans.
"That made me really happy and gives me much greater confidence in adapting to live and play here.
"I hope I can repay their faith by adapting quickly to the team, the place and my team-mates and life in Sunderland.
"I'm just so happy with everything and that inspires me to adapt as quickly as possible."
He continued: "[The fans can expect] a lot of professionalism from me.
"I'm a player that works hard on the pitch and that tries to run a lot with the ball and cover a lot of ground.
"The fans will see me work my hardest every game and play in the right way for this football club."
Riveros spent the summer playing for Paraguay in the World Cup, appearing in every game for his nation until they were knocked out in the quarter finals by Spain.
"The World Cup was fantastic for Paraguay as a nation, for me and for the team as a whole," he added. "The truth is that, in history, Paraguay has never made it to the quarter finals.
"But even though we did so well to get to where we did, we felt that we could have beaten Spain, but they were a great side.
"I didn't get much time off but what I got I was happy with. I couldn't wait to get here to start with Sunderland and get used to my new team, the people here and the fans."