By Toby Cudworth Mikel Arteta says he knew after just 10 seconds that Raheem Sterling was the right signing for Arsenal to make on transfer deadline day. Sterling was frozen out at London rivals Chelsea despite playing a prominent role in Enzo Maresca’s pre-season plans – the 29-year-old the most high-profile victim of an overly bloated squad in west London – and completed a season-long loan move to the Gunners in the final hours of the summer window. He joins a strong-looking Arsenal forward line that boasts the likes of Bukayo Saka, Kai Havertz, Gabriel Martinelli, Gabriel Jesus and Leandro …