The Barcelona coach was impressed with his team's 3-2 victory over Real Madrid but is aware that his players will have to finish the task at the Santiago Bernabeu
The former assistant to Pep Guardiola was content to have emerged victorious against Jose Mourinho but is aware that there is a long way to go before his side can collect the trophy.
Speaking to the media post-match, he stated: "I think we played a good game, we had control most of the time, against Madrid you can't expect not to give away chances.
"Of course, this result isn't decisive, for either of the teams. The tie is still completely open, certainly against a team like Madrid. They have talented players, they can score from few chances."
The 42-year-old also refused to blame Victor Valdes after Angel Di Maria capitalised on his goalkeeping error to bring Real Madrid back into the tie in the closing stages.
He added: "He has given us a lot the past years, he should continue.
"Four-one was close, it became 3-2, that's football, it can happen. But I stick with how we played. Now, off to the Bernabeu."
Barcelona visit Osasuna this Sunday in La Liga before the second leg of the Supercopa at the Santiago Bernabeu next Wednesday evening.