Inter Milan laid down an early title marker on Saturday by handing out a 5-1 derby hammering to AC Milan and going it alone at the Serie A summit. Four wins from their opening four matches have Inter leading the pack with a perfect 12 points, two ahead of their other fierce rivals Juventus who earlier beat Lazio 3-1. Milan are third, a further point back after being taught a humiliating lesson by their local rivals. Spurred on by the majority of a heaving and raucous San Siro crowd, Inter claimed their fifth straight derby win in all competitions thanks to a Henrikh Mkhitaryan brace, Marcus Thuram's rocket and two late strikes from Hakan Calhanoglu and Davide Frattesi.