By Tom Gott Liverpool right-back Trent Alexander-Arnold has vowed to keep his positivity following a week of intense scrutiny. After being left out of Gareth Southgate’s matchday squad for England’s last Nations League game of the recent break, Alexander-Arnold’s defensive abilities have been criticised once again, but he enjoyed a rare moment of relief on Tuesday as he bagged a glorious free-kick to steer the Reds towards a 2-0 victory over Rangers. Alexander-Arnold told BT Sport after the game that he has been blocking out the noise and focusing on his own game. “The performance was great fr…