Former Liverpool ace Glen Johnson has urged the Reds to ensure 25-year-old defender Trent Alexander-Arnold does not leave Anfield for Real Madrid. Alexander-Arnold’s contract with the Premier League giants will expire next summer. He is yet to sign a new deal with Liverpool and will be free to discuss with clubs outside England starting in January. However, Johnson feels the England right-back is too good to run down his deal and join the LaLiga and UEFA Champions League winners for free. Real Madrid are said to be monitoring Alexander-Arnold’s situation and could sign him for free next summer…