Barca dominated for long periods and looked likely to win the match after a fine Lionel Messi effort gave Guardiola's side the lead after 20 minutes.

But the Catalans failed to capitalise on their superiority and were pegged back by an Emilio Nsue header three minutes before the interval.

Bojan Krkic hit the post late on for Barca and the home side missed further opportunities to win the match in the closing stages.

"There are no excuses today," Guardiola said.

"We had the chance to close the game and we didn't do it. We have dropped two points. We should have won and we didn't."

In the build-up to the match, Guardiola had proudly boasted of his side's ability to penetrate any kind of defence.

However, he was left frustrated this time around and he knows that creating chances is not enough on its own.

"Scoring is not a question of chance," he said.

"We are generating the play and we created a lot of chances today, but it just didn't happen."

Barcelona have now failed to win all three games in which summer signing Javier Mascherano has started and the champions have picked up just four points from a possible nine at home.

Virtually untouchable at the Nou Camp in recent times, Barca have already lost to promoted side Hercules and narrowly beat Sporting Gijon in their last match at the famous old ground.

Guardiola, though, remains unconcerned, saying: "It's a hard league and teams come here and make it difficult for us, but on another day we would have won comfortably."

Mallorca coach Michael Laudrup admitted his side had ridden their luck on occasion.

"They attacked us infinitely in the first half," he said.

"To do something here you need to have some luck and for your keeper to have a great day."

Mallorca keeper Dudu Aouate did indeed have an inspired evening, although Barca - without the injured Xavi and the suspended David Villa - were guilty of missing a series of decent opportunities.

"Barca created a lot of chances but they didn't take them," Laudrup said.

"But I'm not the Barcelona coach and that's not my problem."

Barca are now in fourth place, three points behind leaders Valencia and one adrift of fierce rivals Real Madrid, who thrashed Deportivo La Coruna 6-1 at the Santiago Bernabeu tonight.

The Catalans suffered a further blow as Pedro departed with a muscle injury in the closing stages.