Sio, who is known for his relaxed demeanour, has played all across the back line for the Robins this season, nabbing 14 tries in 18 Super League games.
“I’ve got to keep going and do my part for the team and the team’s got to do our part for the fans as well,” he told his club’s official website.
“Every game does matter and we’re going to have to keep digging deep and performing week in, week out.
“We’re going to have to take it match by match and keep getting stronger.
“Salford are next up, they’ve got a big pack and we’ve just played them.
“We’ll go back to the drawing board and do what we have to do to go over there, play our game not theirs and hopefully come away with the win.”