"For the last 20 minutes we were playing with 10 men, Rudy's hamstring went and he was lame," said Malky Mackay.
"We worked ever so hard for each other and they didn't cause us any problems until the last two minutes or so.
"For the first 25 minutes of the second half we came out of the traps and really penned Leicester and the pressure would have ended up telling.
"I've had three down in the first half, which is quite bizarre.
"We knew we had to up the tempo. Craig Conway took a bad tackle in the first minute and rolled his ankle. We gave him 15 minutes.
"By half-time 'Huds' took a nasty challenge on his ankle.
"We felt we were in casualty ward 10."
Both sides had opportunities to win the match, but wasteful finishing coupled with impressive defending meant the sides' second meeting in five days ended as a stalemate. Cardiff won a penalty shoot-out in the Carling Cup on Wednesday after a 2-2 draw.
Leicester enjoyed the majority of possession and territory in the first 45 minutes, with Matt Mills and Andy King both missing the target for the visitors, but Cardiff dominated the second half.
Peter Whittingham hit the sidenetting with a free-kick, Kenny Miller was foiled by goalkeeper Kasper Schmeichel and Mills produced a superb block to stop Gestede. But no one could find the killer touch.
Darius Vassell should have punished the Bluebirds with three minutes remaining, but smashed a shot high and wide after being played clean through before nodding against the crossbar deep into injury time - leaving the two sides to settle for a point each.
Leicester boss Sven-Goran Eriksson was pleased to see his team gain some reward, and the former England manager believes the Foxes are starting to gel.
"Lately you can see, even against very strong teams, it is very difficult to beat us. And that is very good," Eriksson said.
"If we keep keeping clean sheets and creating chances we will win a lot of games.
"I think we were okay in the first half and played good football. I wouldn't say we were in control but okay.
"I think we stopped in the second half and started to kick long balls.
"For 20 or 25 minutes Cardiff were on top, then the last 15 we started to play and we created good occasions to score.
"We can't be disappointed with 0-0 away at Cardiff. A clean sheet is good for the 'keeper, defenders and team. It's not an easy place to play."
Eriksson praised defender Mills, a £5.5million capture from Reading in the summer, who was excellent throughout for the visitors.
"It's what we hoped when we bought him," said Eriksson. "He is a leader in the back line. He is strong, steady and he was great today."