For English-speaking users...

For English-speaking users: Alexander Peresvet / Peresviet (Александр Пересвет), was a Russian Orthodox Christian monk who fought in a single combat with the Tatar champion Temir-murza (known in most Russian sources as Chelubey or Cheli-bey) at the opening of the Battle of Kulikovo (8 September 1380), where they killed each other.