Djokovic and Murray face giant challenges

Andy Murray of Britain leaves after a training session at the Wimbledon Tennis Championships, in London July 4, 2013. REUTERS/Stefan Wermuth

LONDON (Reuters) - Wimbledon 2013 will be remembered as a tournament of shocks but unless giants Juan Martin del Potro and Jerzy Janowicz can chop Novak Djokovic and Andy Murray down to size, Sunday's men's final will be a showdown between the world's top two players.

In a sport that plays on the psychologically vulnerable and demands supreme levels of physical endurance, the consistency of Djokovic and Murray in reaching the business end of grand slams is nothing short of remarkable.