A win or draw for the Toon could see City surrender the table leadership to Manchester United.
"I know United fans will be rooting for us, and I wouldn't feel any guilt if we stopped City from winning the title," said Krul. "It's so close now. We couldn't have dreamed of being in contention for the Champions League at this stage of the season.
"What a feeling to walk away with a 2-0 win at Chelsea. The confidence is back - bring on City! It's going to be electric on Sunday at St James'. We've had Man United and Sunderland and I'm sure the fans will generate the same atmosphere as they did in those two games. That will make teams crumble, hopefully.
"If you have a striker like Cisse in your team you'll win games."