Constantine Louloudis and George Nash selected by GB

Constantine Louloudis
Constantine Louloudis helped Oxford to victory in the Boat Race in April

Boat Race rivals Constantine Louloudis and George Nash have been called up by Great Britain for the men's pair at the Lucerne World Cup regatta in July.

The duo finished fourth in the national trials at Eton-Dorney in April.

"They have shown their pedigree at junior and under-23 level and impressed at the senior trials," said team performance director David Tanner.

"They will want to use this opportunity to prove themselves. They are certainly names on the GB radar for the future."

The duo, who were on opposing sides when Louloudis's Oxford crew beat Nash's Cambridge in this year's Boat Race, are the second GB pair in the event, which already includes world silver medallists and Olympic men's four gold medallists Andrew Triggs Hodge and Pete Reed.

For Triggs Hodge and Reed, Lucerne presents an opportunity to take on New Zealand pair Eric Murray and Hamish Bond, the 2011 world champions.

The entire British team pulled out of June's Hamburg World Cup event because of the E.coli outbreak in the area.

Since then, Anna Watkins has recovered from a back injury and takes her place alongside Katherine Grainger in the women's double scull in Lucerne.

Mel Wilson takes the place of the injured Fran Houghton in the women's quadruple scull, but Zac Purchase has not fully recovered from a post-viral episode so Adam Freeman races with Mark Hunter in the men's lightweight double scull.

With Chris Bartley injured, Peter Chambers steps into the lightweight men's four alongside his brother Richard, Paul Mattick and Rob Williams.

Wales' Tom James takes his place in the men's four while compatriot Vicky Thornley switches back from sculling to join the women's eight.

Many of the GB squad, including Triggs Hodge and Reed and the women's eight, are competing against international opposition at Henley Royal Regattaexternal-link this week - their last event in the UK before the London 2012 Olympics.