The Spaniard, a £20 million signing from Sevilla over the summer, has seen his action in a blue shirt restricted to just two substitute appearances despite scoring twice as many goals as his fellow Bosnian forward.
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"Of course it’s hard being on the bench but that’s how things are at the moment," the 28-year-old told reporters.
"The manager has decided that Edin will start, so all I can do to try to change that is to keep on working in training and be ready whenever he calls on me from the bench.
"He [Pellegrini] hasn’t said anything at all to me. He’s just said that Edin is playing from the start, so all I can do is work.
"I’ll never get used to being on the bench, obviously, but that’s the same for everyone - we all want to play and only 11 can and it’s up to the manager to decide.
"But each goal means the team gets a win, it helps me keep my confidence up and makes sure I keep improving."
With two goals already to his name and one controversially ruled out against Newcastle on the opening weekend, Negredo believes he is adapting well to life in the Premier League and thinks he can improve even further.
"I like it [the Premier League]. It’s just what I was expecting - a lot of coming and going and the players have so much quality that they can keep the ball," he continued.
"There are lots of changes of possession and it’s very intense. But I’m happy, it’s to my taste and hopefully I’ll keep getting better."