With Zlatan Ibrahimovic having an off day, Manchester United turned to a striker at the opposite end of his career to keep their winning run going in the Premier League on Saturday.
Marcus Rashford came off the bench and scored two minutes into injury time to give United a 1-0 victory at Hull, lifting the team alongside Chelsea on a maximum nine points.
Chelsea had it much easier against another promoted club.
Eden Hazard, Willian, and Victor Moses scored in a 3-0 win over Burnley at Stamford Bridge, with a ruthless performance reminiscent of those produced in the team's title-winning campaign in 2014-15, when Mourinho was Chelsea coach.
Leicester and Arsenal, the top two teams last season, racked up their first wins at the third attempt, and their star attackers were back on the score sheet.
Jamie Vardy set champion Leicester City on their way to a 2-1 win over Swansea at King Power Stadium. Wes Morgan added a second goal and Leicester winger Riyad Mahrez had a penalty saved before Leroy Fer pulled a goal back for the visitors.
Great performance from all the lads today! More wins to come... 👊 pic.twitter.com/ZKlHvHxIC2— Rob Holding (@RobHolding95) August 27, 2016
Alexis Sanchez was the inspiration behind Arsenal's 3-1 victory at Watford, earning a ninth-minute penalty converted by Santi Cazorla, scoring himself, then setting up Mesut Ozil for the third goal before halftime.