By Simon Mullock Phil Foden doesn’t agree with Pep Guardiola’s claim that he should now be considered world class. The Manchester City midfielder is in line to make his 100th Premier League start in the derby – and is averaging one trophy for every 16 of the 256 games he has played for his boyhood club over the past six years. Guardiola believes the 23-year-old is now one of the best in the game after excelling in a more central role – but Foden insists he still has more to do. Foden said: “I wouldn’t say world class yet. I think I’ve got the potential to be, but to hear that from the manager …