Guus Hiddink made himself "unapproachable"" at Chelsea for two days because he was so angry at the "injustice" of their Champions League exit to Barcelona.
Chelsea had four penalty appeals rejected by referee Tom Henning Ovrebo as Andres Iniesta scored a last minute away goal to give Barca a place in the final against Manchester United.
The Dutchman, preparing to face Blackburn on Sunday and to select a Chelsea side for the last time at Stamford Bridge, admitted: "What happened against Barcelona exhausted me. For two days, even normal questions drew a reaction from me after that, and that was because I was exhausted."
He added: "I knew that I didn't want anyone coming near me. I was angry because you felt injustice. Everyone felt that, even people recognised it who weren't involved with Chelsea.
"You feel this huge frustration. I was frustrated when we (Holland) didn't get to the World Cup final in 1998 when we lost to Brazil in the penalty shoot-out, but that was to a good opponent.
"That was frustration because we were disappointed. I could not be angry with the referee or the opponents who took the penalties.
"I didn't apologise to people but they kept their distance. It's not a nice quality from myself in these circumstances, but they stayed away for two days. I don't have to apologise for not talking to anybody."
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