Stoke City boss Tony Pulis has admitted that his side didn't create enough opportunities in front of goal in their 1-0 defeat to Everton.
Kevin Mirallas scored the only goal of the game to extend the Potters' winless run of games to five.
Pulis told the club's official website: "We haven't played many games where we haven't created any chances, and that was the case again today.
"Obviously it is a bit of a worry, because we had more than enough chances to have got a point from the game, or even won it.
"You sometimes have a run of games where these things can happen, and unfortunately for us, we are on one of those runs right now."
Stoke are now 13th in the Premier League, just four points adrift of the relegation zone.