Former Mamelodi Sundowns coach Hristo Stoichkov has penned a heartfelt letter to under-fire FC Barcelona star Philippe Coutinho, and, in it, touched on Lionel Messi's decision to give a crucial penalty to the Brazilian recently.Stoichkov played for แทง บอล สด the Catalan giants between 1990 and 1995, and again between 1996 and 1998, claiming 13 trophies, including five LaLiga titles and one UEFA Champions League crown, during his time at the Camp Nou.The Bulgarian, who later แทง บอล สด coached Masandawana between 2009 and 2010, has now written a heartfelt letter to Coutinho, telling him not to give up despite his struggles this season.