Argentina and Belgium reached the Olympic Games hockey final for the first time yesterday as defending champions Germany and fellow favourites Netherlands came up short. Argentina stunned Germany, the gold medallists in 2008 and 2012, by 5-2 while Belgium clinched a 3-1 semi-final win over neighbours Netherlands, the 1996 and 2000 champions.Defender Gonzalo Peillat hit a hat-trick of penalty corners with Joaquin Menini and Lucas Vila giving Argentina a 5-0 lead.Argentina, ranked at seven in the world, have already surpassed their best previous Olympic performance of a fifth-place finish at the 1948 Games in London. Four years ago, in London again, they were 10th.