Cook in particular will be difficult to replace. We were already struggling to find an opener to partner him and someone to go in first wicket down. Now we need to find an entire top three with the Aussies due here next summer.
I'll elaborate. World class in the context of test cricket now. Basically one day or bash cricket is to the fore now. One day cricketers mostly attempting to adapt to test cricket. But Cook yesterday for me it was one of the great sporting occasions that occurs very rarely. Anderson equaling the all time test wickets for a fast bowler can't think of many better sporting achievements.