Manager’s deal expires at end of the new season ‘They don’t have to worry … I want to be here’ Mikel Arteta has said he is relaxed about his Arsenal contract expiring at the end of the new season and believes his side will need to be better than last year to defend their title successfully. The Premier League champions will face Enzo Maresca’s Manchester City in the Community Shield in Cardiff on Sunday and are heavy favourites to win back-to-back league titles for the first time since the 1930…