Daniel Tupou will line up for NSW City against Country in Wagga Wagga on Sunday after overcoming a stomach bug.

The Sydney Roosters winger trained strongly with the team on Friday and coach Brad Fittler said he was a certainty to take the field.

The incumbent NSW winger spent Thursday confined to his hotel room and was reportedly in doubt for the City-Country clash.

However, with his spot in the Blues side for their State of Origin defence on the line, he is desperate to play.