Getty Francis Ngannou’s Coach Identifies Vadim Nemkov as Top PFL Challenge Francis Ngannou ‘s coach, Eric Nicksick opened up about his potential options for opponents and specifically named Vadim Nemkov . Nicksick called Nemkov the toughest fight outside the UFC and believes a PFL heavyweight title clash makes the most sense. Nemkov recently captured the inaugural PFL heavyweight championship with a dominant win over Renan Ferreira. That victory was believed to have set the stage for a showdown