Kelly is fully fit for preseason training.
"The World Cup is certainly an incentive," he told the Liverpool Echo. "With Roy [Hodgson] being the England manager, I'm sure he will be looking.
"But for me at the start of the season I just need to concentrate on doing well for Liverpool. I need to show why Brendan Rodgers gave me the new contract. I need to give Brendan and Liverpool something back and show why he has faith in me.
"My first target is to get my fitness up, crack on and get back to where I was at the start of last season.
"In football, things can change quickly. If I take my chance again and do well then I'm sure the England manager will be watching."