England coach Roy Hodgson admits its been difficult to plan for his latest squad.
Hodgson watched Team GB in action twice during the Olympics.
"It's been more difficult than usual (to watch players) this year because the clubs have travelled so far," said Hodgson.
"Most of the top clubs have travelled to places like America, China and South Korea so it has been difficult to keep tabs on it.
"But we've done the best we can over the last couple of weeks before Friday's squad announcement and I will manage to see some matches.
"I will be relying on what we know about the players and using the information and the knowledge that we used before picking the Euro squad to pick a squad for this one."