Loffreda and his under-strength squad have only travelled from Argentina because their Union signed a contract which he has agreed to honour.
However, the Pumas coach has made it clear the game is now devalued, with Stade Francais pair Agustin Pichot and Rodrigo Roncero, and Toulouse's Omar Hasan, absent because of the Heineken Cup Final 24 hours earlier.
Wasps centre Ayoola Erinle has finally been given the recognition his form has deserved after being called up for England's match with the Barbarians on 28 May and the Churchill Cup tour.
Erinle replaces Mike Tindall, who underwent shoulder surgery yesterday. Gloucester prop Phil Vickery has also been ruled out after failing to recover from a broken arm.
Iain Balshaw, of Leeds, has also been ruled out of the Lions tour after failing to recover from a leg injury. His replacement is Sale's Mark Cueto, who was a surprise omission when the tour party was originally named.