Arsenal have started the new Premier League season with two wins as the transfer window closes, looking in ominous shape to retain the crown they won for the first time in 22 years last season. Have their main rivals done enough to prevent Mikel Arteta's side winning a second successive title? Chelsea may have lost Enzo Fernandez to Manchester City for £125m in the final hours of the window, but the business done this summer will still delight new manager Xabi Alonso.