Current boss Roy Hodgson has come in for criticism after his side were knocked out of the World Cup at the earliest juncture, and Redknapp believes that Hodgson's likely replacement is currently plying his trade on Merseyside.
"It will be hard whenever Roy goes," the 67-year-old is quoted as saying by The Mirror. "The two brightest managers in the Premier League are both on Merseyside - one's from Northern Ireland and the other is Spanish.
"The way they play football is suited to international football, the passing and movement they produce in their teams is fantastic.
"Brendan has done an amazing job at Liverpool while Martinez has been excellent this season at Everton as well."