It doesn't have to cost a fortune to stock your cellar with red wines to impress your guests at summer barbecues this summer. An Asda red wine priced at £4.37 has been named the best in the world in a blind tasting test with a panel of 240 experts at the world's largest and most influential wine competition. La Moneda Reserva Malbec from Central Valley in Chile (2015) was awarded best in show in the best single-varietal red under £15 at this year's Decanter World Wine Awards, from 16,000 other entries.The wine is currently sold out on the Asda wine shop but is still available at the grocery website.