Forward James Tindall insists all Great Britain's Olympic hopefuls have to play to their maximum without fear of injury if they are to maintain progress towards this summer's Games.
The men's squad, who finished third at the Olympic test event after a 2-1 win over India, lost Simon Mantell to a fractured metatarsal on Thursday. He will have an operation to insert a pin this week.
Coach Jason Lee is already delaying selection for as long as possible in order to give Surbiton forward Matt Daly the chance to recover from a long-term injury.
The women's team, who won their event with a 2-0 win over under-strength world champions Argentina, also had injury scares with key players Crista Cullen (ankle) and Alex Danson (shoulder) being forced off on Sunday.
But Tindall stressed injuries - Australia's Graeme Begbie had his Olympic dream ended by a knee problem in a practice match at the Riverbank Arena last week - should not affect their approach as the clock ticks down towards final selection.
"Playing in tournaments there are always going to be risks," said Tindall.
"It is a little bit tight to get everything right, but luckily there is time (to recover) and fingers crossed we can choose from the whole squad.
"If you go into something and don't give it 100% and don't put everything in, you are more likely to get hurt.
"You have to go flat out because you know there will be an Aussie somewhere putting 100% in and if we don't match him or better it, then what is the point really?"