Arsenal were dominant in the first half against Bournemouth, but they will be frustrated that they did not score more. The Gunners created chance after chance against the Cherries at the Emirates, but only took the lead through Bukayo Saka’s penalty in the 45th minute. Mikel Arteta’s side could have been in an even more comfortable lead if both their finishing, and referee decisions went their way. Saka went down with a concerning injury early on in the first half after a dangerous challenge from midfielder Ryan Christie, and bizarrely, the Scotland International was not even awarded a yellow …