Vikingur Reykjavik will prevent KR from covering the 2.5-goal spread at KR-völlur on September 1 and protect their lead on matchday 21 of the Úrvalsdeild. Vikingur sit atop the table with 51 points while KR sit second with 43, and KR's form of three wins and two draws with 19 goals for and nine aga…