Warnock and Benitez called a truce in their feud to shake hands before kick-off.
Warnock was furious at the Spaniard for fielding a weakened Liverpool team, which lost at Fulham in 2007. It helped the Cottagers escape relegation at the expense of Warnock's Sheffield United, who then sacked their manager.
Warnock quipped: "I shook Rafa's hand because I owe him big-time. Without him I wouldn't have been able to manage great clubs like Crystal Palace, QPR and Leeds."