Manchester Uited set up an EFL Cup semi-final clash against Hull with a deserved 4-1 victory over West Ham.
Zlatan Ibrahimovic and Anthony Martial both scored braces as United cruised into the last four at Old Trafford.
Ashley Fletcher gave the visitor’s hope 10 minutes before the break, pouncing on David De Gea’s error to make the score 1-1.
Armenia international Henrikh Mkhitaryan was a constant menace to the West Ham defence, setting up a goal apiece for Zlatan Ibrahimovic and Anthony Martial.
Portuguese boss was clearly pleased with his efforts against a strong West Ham side.
“I’m so happy because today was against a Premier League team with Premier League qualities with Premier League characteristics,” Mourinho said.