Captain Alastair Cook says England limited-overs places are up for grabs during the five-match one-day series in India.
England begin this year's ODI schedule under new coach Ashley Giles looking to win in India for only the second time.
Their last two attempts, in 2011 and 2008, ended in 5-0 defeats and Giles' team have suffered successive warm-up defeats to India A and Delhi ahead of the opener in Rajkot.
Jonathan Trott, Graeme Swann and James Anderson are at home resting while the injured Stuart Broad is likely to be available for the last two fixtures only.
"I don't know how many places are up for grabs but I would say a lot of them are," said Cook. "I think there's a chance if people perform well and they've got the shirt at the moment. That's what you want, you want competition and people pushing hard to put the people who are in the team now out.
"Performances from people on this tour, if they perform really well, will mean it's really hard to leave out a player."
England host the 2013 Champions Trophy in the summer but must first undertake a trip to New Zealand and a return visit from the Black Caps.
Cook admitted he was already thinking about leading his country in the the second most prestigious tournament after the World Cup and he said: "I think it's a very important trophy.
"We haven't won an ICC 50-over tournament as an England side. So, as a group of players we've got an opportunity at home, in our conditions which we're very comfortable in, to try to win that. I think it's very high on my shopping list."