"It is not tired in the legs, maybe in the mind, but we are going to try not to be tired in our heads," he said.
Chelsea v Barcelona in the Champions League
2008-09 - semi-final
Barcelona 0-0 Chelsea; Chelsea 1-1 Barcelona
(Barcelona win on away goals)
2006-07 - group stage
Chelsea 1-0 Barcelona; Barcelona 2-2 Chelsea
2005-06 - last 16
Chelsea 1-2 Barcelona; Barcelona 1-1 Chelsea
(Barcelona win 3-2 on agg)
2004-05 - last 16
Barcelona 2-1 Chelsea; Chelsea 4-2 Barcelona
(Chelsea win 5-4 on agg)
1999-2000 - quarter-final
Chelsea 3-1 Barcelona; Barcelona 5-1 Chelsea
(Barcelona win 6-4 on agg)
"Anyway in this situation, the semi-final of the Champions League, it doesn't matter if we played three days ago or yesterday, we will be ready to compete to try to reach the final."
In six matches against the west London side as Barca coach, Guardiola has yet to record a victory, and he admitted: "They are a very, very strong team, it's a challenge for us, very, very tough, but we are ready to fight against them."
Meanwhile, Barcelona defender Gerard Pique has said he does not believe Drogba was trying to con the referee by simulating fouls in the first leg.
The Ivorian, who scored the only goal at Stamford Bridge, was criticised for some theatrical falls during last week's match but Pique said: "I believe in Drogba that, every time he fell down, it was because he was in pain, or he felt a kick on him.
"I don't think that, when Drogba fell down, he was trying to act or dive. If he keeps doing that, you might end up thinking that's the case but I believe in his honesty."
Barcelona have won the Champions League three times in the last six seasons, while Chelsea's only final appearance ended in a defeat on penalties to Manchester United in 2008.
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