With goals from Ross Barkley and James McCarthy adding to Lukaku’s achievements in front of goal, Koeman asid said that Lukaku showed the world today how clinical he is.
“He’s a world-class striker,” declared Koeman.
“He’s improving but the big quality he’s showing every day – something that maybe isn’t so difficult in training but it is in games – is how clinical he is. His finishing is one of the best.
“I have the pleasure every day to be on the training pitch when he is finishing, he will always finish in training. He has world-class quality in scoring goals and that was really important because to win the game today we needed to score at least four goals.
“I think we dropped our intensity a little bit but it’s also a big compliment to Bournemouth, who played good football in the second half and made it really difficult by playing really offensively.
“We had difficulties in stopping that but now I’m really happy that I changed the system to five at the back because then we got the control back in the game.
“It was a very tactical game. Both teams changed their system during the game and that made it difficult but we did a job. It was a great game for the fans, not for me after [the half-time score] but it’s three points and we scored six goals. Now we need to learn from the mistakes we made.”