Rio Ferdinand has suggested that Arsenal star Bukayo Saka can improve one thing in his game that could be learned from former Manchester City winger Riyad Mahrez. The 22-year-old winger is enjoying his best season to date with Arsenal with Saka becoming the first English player for the Gunners since Ian Wright to score 15+ goals in the Premier League. With Saka scoring 20 in all competitions along with 14 assists, the forward has firmly established himself as a world-class wide-attacker and one of Arsenal’s most important players in their bid to win the Premier League title. Yet Ferdinand now …