He said: “Liverpool have a great squad of players, so earning a starting position here is not easy at all, and I am used to that.
“Diogo is an excellent footballer and another companion in the squad.
“We all work hard during the week and then the coach decides who comes out. So, I don't have any personal battle with him."
He added: “Liverpool's attack line is spectacular, and I would say comparable to any in the world, in any of the major leagues. Now this year I see it as being even better. And it's not emotion that makes me say this, but simply a result of looking at the statistics.
“As for me, I work hard in training – and then on the field I do what Jurgen Klopp tells me. That is my working philosophy, always."