Former Arsenal star Jermaine Pennant has warned Mikel Arteta that he will have to make an unwelcome change on Sunday. Arsenal face some major challenges heading into Sunday’s North London Derby encounter with Tottenham Hotspur. The Gunners will be missing a number of important players when they take on their fierce local rivals. Mikel Arteta may well find himself having to cope without all of Declan Rice, Riccardo Calafiori, Mikel Merino, Gabriel Jesus, Takehiro Tomiyasu, and club captain Martin Odegaard. Odegaard was recently spotted on crutches, having sustained a nasty-looking ankle injury …