A 21-member Indian team will take part in the five build-up games in The Hague, Netherlands from April 9-19 ahead of the May 31 to June 15 World Cup, to be held in the same Dutch city.
"Trying to give equal opportunities to everyone and might be so it will not be the same squad for the World Cup," Walsh said after the training session at Major Dhyanchand Stadium here.
Walsh said that goalkeeping was an area the team was working hard on and trying to get specialisation.
"We are doing our level best. We looked at the recently culminated National Championship final in Lucknow and there were players of good quality. Some goalkeeper's which selectors are discussing."
"In the past when we used to tackle a lift, we usually used to take the hockey stick back and then swing which used to result in wastage of time. Now we have learnt and put in place this problem where we tackle the lift immediately without taking the swing of the hockey back which puts us in a better position today.