USA national team coach Bob Bradley admits there were plenty of tough decisions when selecting the 30-man preliminary squad for the World Cup.

As always, Bradley had to omit some players from the provisional squad of 30, leaving some dented egos and creating controversy but he feels he was able to put together a good mix of players which will be reduced to a final 23 prior to June 1.

"To be fair, there are tough decisions in all aspects of the process. We have tremendous respect for players who have contributed in the past," Bradley said.

"We also take into account so many players that are playing well week in and week out for their clubs that haven't had the chance to play with the national team. It's a goal and a dream of every player to represent the United States in the World Cup. So, when you go about the process of putting a roster together, we understand and respect what everybody has put into it along the way.

"We feel we've put a very good group together," he added.

"Obviously a lot goes into qualification and many players are involved. It's not always easy to get down to 30, but we feel very good about the group we have. As a staff, we did everything to continue to watch games, assess players and look at situations that involved injuries. We needed to make sure we had full information and again we have been very thorough in being sure we're on top of each situation. Therefore the work has been quite good."