Luis Enrique has claimed that his Barcelona side paid the penalty for their mistakes during Wednesday's 4-1 defeat at Celta Vigo.
Nolito opened the scoring at Balaidos, before Iago Aspas capitalised on a Gerard Pique error to double the lead and give the hosts a 2-0 half-time advantage.
The Catalans, who saw their 100% start to the Primera Division campaign go up in smoke, went on to concede two more suspect goals through Aspas and John Guidetti, after Neymar had briefly reduced the arrears.
"I'm not happy to lose 4-1. I'll evaluate and analyse it but it's a test to show how difficult it can be," Enrique, who once coached Celta, told reporters. "All that remains is to congratulate Celta. They played a very complete game, in terms of effectiveness and their football.
"We suffered a lot in the individual battles - the first goal for Nolito went in the top corner but the second was our mistake. This result will be useful to tell us that it costs a lot to win - I prefer it when a team wins like Celta did, playing well. They're one of the more attractive [teams].
"We already knew if we committed mistakes we were going to be made to pay for them."
As a result, Barcelona, who were top of La Liga going into this round of fixtures, now sit fourth, one point behind co-leaders Celta and Real Madrid.
