Guardiola wins grudge match, Liverpool rout Leicester

Pep Guardiola rocked old foe Jose Mourinho as Premier League leaders Manchester City extended their perfect start with a 2-1 win at Manchester United, while Liverpool crushed champions Leicester 4-1 on Saturday. City manager Guardiola inflicted the first defeat of Mourinho's United reign and collected his eighth win in 17 encounters with his nemesis in a pulsating encounter at Old Trafford.