Villarreal coach Javi Calleja was left frustrated with their 2-2 draw against Rangers on Thursday night.
The coach admitted that the result is a disappointment for the Spanish side.
"We got off to a good start with the goal from [Carlos] Bacca and we had some other clear chances, but we didn't kill the game and allowed them back in it," he said in his post-match press conference.
"We should have killed it off and we didn't.
"Every opponent has some weapons.
"The draw leaves us with a bad taste."