Real Sociedad coach David Moyes says their thrashing by Villarreal shows they need to strengthen in the January market.
The Yellow Submarine thumped La Real 4-0.
Moyes said: "It could have been more, we could have lost more goals. We made some terrible mistakes, defensively bad mistakes, especially with the third and fourth goals.
"I don't think the first goal was a free-kick, I think it was the wrong decision to give the free-kick, but the best team won.
"In the first 20 minutes of the game we had some opportunities, but not enough tonight. We knew we were coming to a difficult ground and we wanted to be hard to beat, and for 50-60 minutes we were, but in the end (it was) not good enough."
On the winter market, Moyes added: "We need a little more time to assess it, but we have to quickly get to a better level than we showed tonight. Villarreal are a good Spanish team and we have to try and get to that level."
