Rio Ferdinand maintains that Arsenal winger Bukayo Saka isn’t world-class – and even used Kalvin Phillips as an example this time. Former Manchester United defender Rio Ferdinand caused uproar last week, suggesting that Arsenal wide man Bukayo Saka simply isn’t world-class yet. Ferdinand did state that Saka has been ‘unreal’ but feels it is simply too soon to call him world-class. The ex-England ace noted that Saka is only just in his first Champions League campaign this season and hasn’t yet proven himself in the ‘nitty gritty stages’ in Europe. Ferdinand feels that Saka can become world-clas…