Slaven Bilic expressed his disappointment with his sides performance despite beating Karabükspor 2-1 away.
“We got the win but I am not really that pleased with our performance,” Bilic said.
“Too many mistakes were made in the second half, our finishing was poor, had we focused more we could have easily scored three or four.
“We struggled to deal with long balls and were really poor in the last 10 minutes.
“Karabükspor showed that they are no pushovers, while we was thinking about scoring a third goal they pulled one back and then we panicked for 10 minutes.
“We have big goals so must see out games better if we are to realise them.
“The way we allowed the opposition to box us in was unacceptable but at the end of the day a win is a win and this was an important victory.”
Beşiktaş moved into first place on 23 points following the win. The Black Eagles face Trabzonspor next week.