Alvaro Morata scored on his Chelsea league debut as the Blues lost 3-2 to Burnley on Saturday at Stamford Bridge.
Manchester United boss believes goals are like oxygen for strikers and he has hailed Morata, Alexandre Lacazette, Wayne Rooney and Romelu Lukaku for all scoring on their league debut for their new clubs.
“Any striker can play phenomenally hard but if he doesn’t score goals the pressure is on them,” Mourinho said.
“So good for him (Lukaku), good for Wayne Rooney, Lacazette, Morata – good for all the strikers arriving in new clubs and scoring in the first days.
“It is always oxygen, happiness and confidence for them.”