Beijing champions Purchase and Hunter return for GB
International Rowing 2010 World Cup - Munich 18-20 June; watch Sunday's finals 0840-1205 BST live on red button (not Freeview) and online (UK only), highlights on BBC Two 1710-1800 BST and afterwards on iPlayer World Cup - Lucerne 9-11 July, World Championships - New Zealand 31 Oct-7 Nov
Olympic gold medallists Hunter and Purchase are back for Munich
Olympic champions Zac Purchase and Mark Hunter will race in their lightweight double scull for the first time since Beijing at the next World Cup event.
Hunter, who took a year off to coach in California, began the season with a back injury but returns for Munich.
Purchase, who missed 2009 through illness, won in the single at the opening World Cup race in Slovenia.
Much of the rest of the squad is unchanged for this month's round, with Greg Searle staying in the men's eight.
Beijing Olympian Tom James had been expected to bolster the eight but has failed to recover from back trouble.
Hunter swaps California for London 2012
Katherine Grainger and Anna Watkins get a chance to repeat their feat from Slovenia of winning two events - the double and quadruple sculls - in the space of just over an hour.
And Pete Reed and Andy Hodge remain in the pair, where they will bid to end a run of seven successive defeats at the hands of New Zealanders Hamish Bond and Eric Murray.
"We are not frightened of a challenge," said Reed. "They are a class act but I'm sure we will have our day."
Great Britain won six gold medals and four silvers at the World Cup opener in Bled last month.
But opposition in most events in Munich is likely to be tougher, with Australia, Germany and Canada entering the fray and New Zealand deepening their squad.
Great Britain squad for Munich:
Openweight women:
Pairs (three boats): Jessica Eddie, Louisa Reeve; Natasha Page, Victoria Thornley; Helen Glover, Heather Stanning
Eight: Jo Cook, Louisa Reeve, Natasha Page, Victoria Thornley, Jessica Eddie, Lindsey Maguire, Olivia Whitlam, Alison Knowles, Caroline O'Connor (cox)
Double scull (two boats): Katherine Grainger, Anna Watkins; Beth Rodford, Annabel Vernon
Quadruple scull: Annabel Vernon, Beth Rodford, Anna Watkins, Katherine Grainger
Openweight men:
Pair (two boats): Peter Reed, Andrew Triggs Hodge; Cameron Nichol, Tom Burton
Four: Alex Partridge, Richard Egington, Alex Gregory, Matt Langridge
Eight: Nathaniel Reilly-O'Donnell, James Clarke, James Orme, James Foad, Mohamed Sbihi, Greg Searle, Tom Broadway, Daniel Ritchie, Phelan Hill (cox)
Single scull (two boats): Alan Campbell; Brendan Crean
Double scull: Matthew Wells, Marcus Bateman
Quadruple scull: Stephen Rowbotham, Charles Cousins , Bill Lucas, Sam Townsend
Lightweight women:
Double scull (two boats): Hester Goodsell, Sophie Hosking; Stephanie Cullen, Andrea Dennis
Lightweight men:
Pair: Chris Boddy, Adam Freeman-Pask
Four: Richard Chambers, Paul Mattick, Rob Williams, Chris Bartley
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