Great Britain women's head coach Danny Kerry has expressed his belief that selection will prove "challenging" for next month's World League semi-final.
Kerry has recalled Helen and Kate Richardson-Walsh as part of his 18-player squad for the event which takes place in Valencia between June 10 and June 21.
Kerry is quoted by BBC Sport as saying: "Selection should always be challenging and it is a testament to the depth of quality within the group."
Great Britain face fixtures against Spain, Argentina, China and Canada during their time in Spain.
Great Britain's 18-player squad
Giselle Ansley, Sophie Bray, Alex Danson, Susie Gilbert, Maddie Hinch, Joie Leigh, Kirsty Mackay, Hannah Macleod, Emily Maguire, Shona McCallin, Lily Owsley, Helen Richardson-Walsh, Kate Richardson-Walsh, Susannah Townsend, Georgie Twigg, Laura Unsworth, Hollie Webb, Nicola White
