There have been huge improvements to Manchester United’s defence this season and they are still yet to add Luke Shaw to the mix. The Red Devils kept their third consecutive clean sheet on Saturday evening after the 0-0 draw with Crystal Palace. Erik ten Hag made no changes to the backline that helped secure a 3-0 win against Southampton the week prior. £13m summer signing Noussair Mazraoui kept his spot at right-back alongside £38m arrival Matthijs de Ligt. Lisandro Martinez continued his partnership alongside De Ligt at centre-back and Diogo Dalot extended his impressive run of form at left-b…