The Liverpool defender was left out of the England squad for the UEFA Nations League clash against Germany on Monday with the World Cup looming. England manager Gareth Southgate has explained why Liverpool defender Trent Alexander-Arnold was left out of the squad for the UEFA Nations League clash with Germany on Monday. The 23-year-old was not alone in his exclusion as he sat the match out alongside Jarrod Bowen, James Ward-Prowse, and Fikayo Tomori. Speaking ahead of the match to Channel 4, Southgate explained his reasons for leaving Alexander-Arnold out, insisting it was not related to the World Cup that…