Chelsea boss Frank Lampard has sent a subtle warning to his strikers after Sunday's win over Aston Villa.
The Blues failed to turn their first-half dominance into goals and entered the break down 1-0 thanks to Villa's Kortney Hause.
Lampard's side eventually came back to win 2-1, but the Englishman was annoyed with their wastefulness.
"I was frustrated at half-time, without a doubt," said Lampard. "I was worried that it gave them an opportunity to be solid against us and to break on us.
"We had to keep doing well what we did in the first half. To keep doing it, not to get bored.
"We had to keep going down the sides. We got down the right hand side a lot in the game and eventually we got a goal from it.
"We expected that [to dominate the game], with the greatest respect to Villa. The way we've been training, the way we move the ball the things we try to do to get to the 18-yard box we did pretty well but sometimes there's little areas around the edge of the box where we can do better.
"Hopefully that will improve. but that's been the story of our season. it was nothing new today to play well, concede and have to fight our way to victory. We haven't always got victory and that's the next stage for us, to try and be more clinical for the moments when we're on top."
