Journalist Charles Watts believes that Mikel Arteta will now stick with one Arsenal player in key position for the rest of the season. The regular Arsenal starting XI has undergone several evolutions over the course of the campaign. At the start of the season, Mikel Arteta trialled certain tactical ideas and had faith in certain players which weren’t to last long. For instance, for the first two Premier League games of the campaign, Thomas Partey was named at right-back. Arteta also had plans to use Kai Havertz in midfield, but the German has now established himself as a striker. Eddie Nketiah…