bayern munich take on porto in the champions league quarter-final .
pep guardiola bidding to reach sixth semi-final in sixth year as a manager .
from 2005-2009 england had 12 out of 20 champions league semi-finalists .
in last five years only three semi-finalists have been from premier league .
guardiola changed barcelona tactically , introducing relentless pressing .
lionel messi brought into it when guardiola supported him against the club .
premier league clubs have struggled to cope with that intensity in europe .