Richard, He was apparently escorting the German bomber raids to destroy the Kursk railway junction on the 02 Jun 43. At
www.allaces.ru in the episode section it has three events listed for that day but it probably will not help much. JG 51 was involved in the escort and maybe I/JG 26 so you would need more information from both sides besides what is there to figure out if there was actually a "LaGG-3" shot down.